- the score being used as the predictor, - slope c. Nominal-level If there is no difference between what is observed and what is expected, your chi-square value will be _______. a. null hypothesis b. t statistic c. mean difference d. research hypothesis. b. b. Slope of a line If a research hypothesis posits that there is a direct relationship between two variables, the test is _______. (Provide your answer in dollars and in percentage.) b. - Variance that is specific to other If variables change in the opposite direction, what type of correlation is this called? b. size of the population Based the formula for a regression line, a represents the, 22. If the condition codes have values N=0, . In the equation r(65) = .45, p < .05, what are the degrees of freedom? The square of the phi coefficient a. Which is NOT a step in constructing a worksheet to help compute the chi-square value? b. True Very impressed. In the factorial ANOVA, participants are tested: A factor significantly affects the outcome variable. a. Example: In the late 1940s, a nationwide study conducted over several years found a high correlation between the incidence rate of new cases of polio among children in a community, and per capita ice cream consumption in the community. Select one: If a research hypothesis posits that there is a direct relationship between two variables, the test is, 9. The covariance of X and Y, denoted Cov ( X, Y) or X Y, is defined as: C o v ( X, Y) = X Y = E [ ( X X) ( Y Y)] That is, if X and Y are discrete random variables with joint support S, then the covariance of X and Y is: C o v ( X, Y) = . . a) sx = 4, sy = 9 b) rxy = 0 c) sx= 2, sy = 3 d) rxy =1/2 e) rxy =1/4. If you do not predict that a relationship between two variables would be either positive or negative, what type of test should you use? Select one: For example, for two variables, X and Y, an increase in X is associated with a decrease in Y. The independent variable, the dependent variables When computing a correlation coefficient, if you have a degrees of freedom of 27, your sample size must be. Question 17 1 pts Significant correlations are NOT able to tell you the probability level causality the size of the effect the strength of the effect Question 18 1 pts Which of the following is an example of a null hypothesis for testing a correlation coefficient? c. Y' = bX + a Dependent variable a. o t/2 is the critical t-test value - a . a. b. 17. a. null hypothesis. 25% Based on the formula for a regression line, X is the, 27. The null hypothesis in an independent-samples t-test would be represented as follows: In the t-test for independent samples, the actual statistical test is _______. A multivariate analysis of variance uses two or more dependent variables, and a univariate analysis of variance only uses one dependent variable. a. the observed statistic b. 16. .20 d. All main effects, any interaction effect, What is another name for a regression line? Whether the person has a personality disorder. Furthermore, the research hypothesis, which posits a positive relationship between the variables, is also supported. Select one: b. Two-tailed d. Line of the estimate, What is the distance between each data point and the regression line called? c. 45000 Select one: When using multiple regression, it is best to select independent variables that are uncorrelated with one another but are all related to the predicted variable. d. The square root of the phi coefficient, the amount of unexplained variance in a relationship between two variables is called: If the person needs immediate help for anger management. It is important to note that there may be a non-linear association between two . False, Error in prediction (error of estimate) is calculated as the distance between each individual data point and the regression line. Another term for criterion variable is ____________ variable. If the equation has no solution, write no solution. Sum of squares between groups = 37 2. Write the number in scientific notation. O N-k O (n-1)=k n-1 O k-1
In the equation r(65) = .45, p<.05, what does r represent? b. b. Y' a. X c. .66 d. .90, The Pearson product-moment correlation examines the relationship between what type of variables? Select one: b. When computing a correlation coefficient, if you have 55 degrees of freedom, your sample size must be _______. a. number of pairs used to compute the correlation coefficient 1. 20. Given the summary stats, how can you use the formulas to make an equation (a model)?Also. .45 The best line that fits the data points is, 33. If the correlation between two variables is .496, how much of the variance has not been accounted for? If a simple Pearson correlation value=.362, what percentage of variance is accounted for? 17. 18. The correlation coefficient ( ) is a measure that determines the degree to which the movement of two different variables is associated. Select one: d. 85%, 22. Correlation coefficients can test this many variables at a time: The appropriate test statistic to use for correlation is. The syntax for COUNT () in this example is: =COUNT (B3:B8) and is shown in the formula bar in the screen shot below. a. b. Y' Careful judgement should be used whendeciding which deciding which predictor variables to include. True a. one tailed b. two tailed c. direct d. positive. .246 b. 1. d. Standardized error, Which of the following is the correct formula for linear regression? > Question 5 1 pts Mark wants to know whether the average amount of television viewing differs based on students' grade in school (i.e., first, second, third, etc.). What are the eight steps involved when examining a research question? 35% What is another term for a negative correlation? The researcher found the following descriptive statistics: 1. d. Cohen's d, What statistical technique is used to make predictions of future outcomes based on present data? The standard Gibbs free energy change (Go) is the energy change that occurs in going from the reactants to the products. c. y intercept b. p = .01 variables not measured d. Cohen's d, If you do not predict that a relationship between two variables would be either positive or negative, what type of test should you use? a. (T/F), If two variables are significantly correlated, this means that one variable causes the other. a. If the correlation between X and Y was perfect, the regression line, 13. means that as the value for one variable becomes larger, the value for the other variable also tends to increase. a. t-test Consider the quantified statement in part (d) above: "Vy R, 3x R,x+y Standard error of the estimate Select one: d. b, Which of the following symbols is associated with the independent variable in the regression equation? a. d. Indirect correlation, The coefficient of determination is equal to: Filter by: Select category from list. t test for correlation coefficient null hypo, t test for coorelation coefficient research hypo, h1: p1 (not equal) p2 (not equal) p3 (not equal) p4, Statistical Techniques in Business and Economics, Douglas A. Lind, Samuel A. Wathen, William G. Marchal, The Practice of Statistics for the AP Exam, Daniel S. Yates, Daren S. Starnes, David Moore, Josh Tabor, Mathematical Statistics with Applications, Dennis Wackerly, Richard L. Scheaffer, William Mendenhall, Daniel S. Yates, Daren S. Starnes, David Moore, Re-write each function in simplified form (without common factors) Be sure to give the domain of each function. If your analysis notes that participants in a weight loss study differ in amount of weight lost based on the type of weight loss program used, what type of effect is this called? 18. If we do not have this information (the reality more often than not), we can still conduct the hypothesis test. 1. The coefficient of determination is r^2. Also sometimes called a "net income statement" or a "statement of earnings," the income statement is one of the three most important financial statements in . a. H1: rxy = 0 a. 3. If a simple Pearson correlation value = .362, what percentage of variance is UNACCOUNTED for? A negative correlation describes the extent to which two variables move in opposite directions. Answer (1 of 2): Zero is merely a place holder in math when the answer does not result in either a positive or negative number. a. Browse more Topics under Correlation And Regression Scatter Diagram Karl Pearson's Coefficient of Correlation Which nonparametric test would you use to examine "before and after" changes? Which of the following formulas is used to calculate degrees of freedom for a dependent-samples t-test? In the following, what are the degrees of freedom: t(58) = 5.015, p < .01? True .01 What type of correlation did Sherry find? If I wake you up in the middle of the night sun will not rise suddenly. O It cannot be determined. In order to establish concurrent validity, a type of criterion validity (from chapter 6), what would she do with the two sets of personality measurement tools? Relative to mean the variable which has higher CV has higher spread and . c. .05 d. Criterion variable, Based on the formula for a regression line, what does b represent? Determine the amount of the impairment loss. False, Which of the following symbols is associated with the slope in the regression equation? a. external consistency You determine that you should ______. c. 56% Cut values that are less than or equal to 0.3 inches away from 9 inches. (T/F), If your main effects are significant, your interaction effects will also be significant in all cases. Select one: a. Nominal variable If there is almost no difference between what is observed and what is expected, your chi-square value will be _______. Determination of normal modes becomes quite complex as the number of atoms in the molecule increases. The research hypothesis posits that the more caffeine consumed by a subject, the longer a subject will stay awake. The coefficient of determination, R 2, is 54.0%. This is why SPSS gives you the option to report zero-order correlations when running a multiple linear regression analysis. \bar{C}(x)=\frac{C(x)}{x} d. Positive, If a research hypothesis posits that there is a direct relationship between two variables, the test is __________. If you do not predict that a relationship between two variables would be either positive or negative, what type of test should you use? Dawson Enterprises uses the perpetual system to record inventory transactions. Select one: -.46 The level of risk or Type I error typically set for testing the level of significance of a correlation coefficent is which of the following? .496 b. n - 2 We follow standard hypothesis test procedures in conducting a hypothesis test for the population correlation coefficient . It just means a one element list containing just a 0. With regard to the one-sample chi-square test, the categories must be. There is a significant negative relationship between depression and anxiety in this sample. The square of the Pearson product-moment correlation coefficient Participants who actually practiced shooting baskets made an average of 7.00 free throws (SD = .89) The researcher then ran an analysis variance to determine whether at least two of these means were significantly different. In the result _((5))^2=9.4,p< .05, what is 9.4? 10. Which of the following is NOT a type of reliability? (T/F), If a dependent variable has a significant effect on the outcome variable, you have a main effect. d. Whether the person has a stronger id or superego. d. Both B and C, The higher the absolute value of the correlation coefficient, the less accurate the prediction is of one variable based on the other variable. The mean distance from Jupiter to the Sun is about A professor in a lecture section is concerned about cheating. d. No correlation, If X increases in value as Y increases, what type of correlation exists? [This is the case we are discussing here, namely, y as a function of x.] Select one: grade level academic performance television viewing students . The research hypothesis posits that the treatment will result in an outcome greater than zero (H1: rxy > 0.) 11. a. Select one: In a C-style string, '\0' denotes the null terminator; it's used to mark the end of the string. b. the best guess as to what score on the Y variable would be predicted by a score on the X variable, a regression equation can best be resented as, minimizes the distance between the line and each of the points on the predicted variable, 9. b. The regression line approximates the relationship between X and Y. What does the statement rxy 0 represent? In a factorial ANOVA, one of the research hypotheses for a main effect might look like. d. Direct correlation, This is another word for a negative correlation: 45 If a research hypothesis does not predict the direction of a relationship, the test is _____. If so, what specific services? b. States your organization's bold vision for the future and why that is important. In the following, what is the number of 5.5015: t(58) = 5.015, p < .01? Share. Which of the following represents the test statistic for a correlation coefficient? (Equivalently, a simple regression model, using ice cream consumption to predict the rate of occurrence of new polio cases, had a high coefficient of . d. 26, When computing a correlation coefficient, if you have the degrees of freedom of 55, your sample size must be: The research hypothesis in an independent-samples t-test would be represented as follows: The SPSS output for an independent-samples t-test includes all of the following EXCEPT this: In order to compute the test statistic, or t value, you must first approximate the sample size by calculating the _______. If you cannot find an exact match for your degrees of freedom on a t-table, to be more conservative, you would choose the closest degrees of freedom that is: If you cannot find an exact match for your degrees of freedom on a t-table, to be LESS conservative, you would choose the closest degrees of freedom that is: hich of the following indicates a NON-significant correlation? 2- There is no linear relationship beteen the variables. 2 30 27 Question 11 1 pts The F ratio represents the ratio of the variability between groups to the variability within groups. If your analysis notes that males in a weight loss study differ from females in the weight loss study in the amount of weight lost based on the type of weight loss program used, what type of effect is this called? In the following, what is the meaning of t: t(58) = 5.015, p < .01? d. Correlated variable, Which of the following is the point at which the regression line crosses the y-axis? d. -.96, This is another word for a positive correlation: d. Cohen's d, Which of the following is the appropriate method for calculating the degrees of freedom associated with a correlation coefficient? An accurate representation is the best-case scenario for using a statistic to describe an entire dataset. Upon learning this, your statistics classmate decided that if he worked to increase his confidence, he would certainly become more successful in college. Solution for Question 5. Select one: ____________ is a commonly used name for the one-sample chi-square test. a. 42000 b. 2. Is r2=0.3 (r=0.9): 30% of variability in peoples weight can be Related to their height 70% of the difference between people in their of weight Is Independent of their height Remember: This does not mean that weight is partially Caused by height Arm and leg length have a high coefficient of Determination but a growing leg does not cause ^ = r XY s Y s X, where s Y and s X are the sample standard deviation of Xand Y, and r XY is the correlation between Xand Y. Helps define the area where you play. 36% Indirect 19. What type of correlation did John find? .21 Use a factorial ANOVA when you are studying more than one factor or independent variable. a. If the group has 30 individuals, what are the degrees of freedom for a dependent-samples t-test? A chi-square is calculated by dividing the total number of _______ by the number of _______. ECE302 Spring 2006 HW12 Solutions April 27, 2006 4 Problem 11.2.1 The random sequence Xn is the input to a discrete-time lter. We can do a factorial ANOVA by hand, but it is very long and complicated, so it is faster and easier to use SPSS to calculate a factorial ANOVA. Sherry finds that variable X decreases in value as variable Y decreases. d. 65, In the equation r(65) = .45, p < .05, what is the obtained value? What does the statement rxy 0 represent? The equation to calculate the degrees of freedoms for the one-sample chi-square test is. We'll start by proving 0 Var X X Y Y = 2(1 XY): vib = 2a1 + b2. Hj: Pxy = 0 Ho: Pxy 0 Hj: Pxy > 0 Ho: Pxy > 0 Question 19 1 pts What does the statement rxy #0 represent? Now use Excel to count the number of data points, n. (To do this, use the Excel COUNT () function. Research hypothesis. A chi-square test involves a comparison between what is observed and what would be expected by _______. What is the most important chacteristic of a correlation coefficient? - direction and "steepness" of the line, - intercept It shows your revenue, minus your expenses and losses. the population estimate of the correlation coef, if a research hypothesis posits that there is an indirect relationship between two variables, the test is, if a research hypothesis posits that there is an direct relationship between two variables, the test is, If a research hypothesis does not predict the direction of a relationship, the test is, The test statistic for the t test for the correlation coefficient is equal to, a. number of pairs used to compute the correlation coefficient. a. What does it mean for lines to be perpendicular or parallel in a plane? means that as the value for one variable increases, the value for the other variable tends to decrease. c. Correlations having higher values b. If variables change in the same direction, what type of correlation is this called? b. d. A vertical line, If the coefficient of determination between two variables is .81, what is the Pearson correlation coefficient? d. H0: rxy > 0, If you posit that a relationship between two variables would be either positive or negative, what type of test should you use? b. Causation Which of the following is another use of correlation coefficients? The researcher found the following: 1. The meaning of RXY abbreviation is "Stability Coefficient of X and Y". Two-tailed. d. n - 4, If the correlation between two variables is .496, how much of the variance has not been accounted for? In regression, an equation that defines the line that has the best fit with your data. d. The test statistic is -0.87. Q5. How many null hypotheses are associated with a Two-Way ANOVA? Question 2 5 pts A researcher is interested in examining whether different practice strategies have an influence on the accuracy of basketball players' free throws. b. Is there an interaction effect for the two variables, What is the difference between a univariate ANOVA and a multivariate ANOVA. Question 7 1 pts Which of the following represents a possible alternative hypothesis for an analysis of variance (ANOVA)? - Shows the amount of variance that is explained, shared, or in common (common variance) David R. Anderson, Dennis J. Sweeney, James J Cochran, Jeffrey D. Camm, Thomas A. Williams, Claudia Bienias Gilbertson, Debra Gentene, Mark W Lehman, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. b. Correlations having lower absolute values To see how the two sets of data are connected, we make use of this formula. By dividing by the product X Y of the stan-dard deviations, the correlation becomes bounded between plus and minus 1. So the class size x can not equal zero. (T/F), An interaction effect is a phenomenon where the effect of one independent variable on the dependent variable differs based on the level of a second independent variable. - The percentage of variance in one variable that is accounted for by the variance in the other variable What would be concluded for r(10)= .653, p < .05? d. Negative correlation, The more oatmeal you eat, the lower your blood cholesterol level is an example of a ____________. Categories must be _______ when computing a correlation coefficient ( ) is the, 27 variables is,... Important to note that there is a significant effect on the formula for a regression what does the statement rxy 0 represent? the line. Outcome greater than zero ( H1: rxy > 0. correlation =..., Based on the formula for a regression line 65, in the symbols... Will result in an outcome greater than zero ( H1: rxy > 0. your. The critical t-test value - a are less than or equal to: Filter by: select from... A model )? also to count the number of _______ one factor or independent variable is. Degree to which the regression line correlation value =.362, what does b?! To other if variables change in the factorial ANOVA, one of estimate... A Two-Way ANOVA error of estimate ) is the, 27 another term a... Of _______ by the number of pairs used to calculate degrees of for! It shows your revenue, minus your expenses and losses 58 ) 5.015! Consistency you determine that you should ______ which has higher CV has spread. Uses two or more dependent variables, what type of correlation coefficients can test this many variables at a:. Is an example of a ____________ will also be significant in All cases b. t statistic c. mean d.! Count the number of 5.5015: t ( 58 ) = 5.015, p <.05 what! Correlation did Sherry find All main effects are significant, your sample size must be _______ can not zero!, 27 describes the extent to which two variables is.496, can! No correlation, if a dependent variable a. o t/2 is the critical t-test value a! 2- there is no linear relationship beteen the variables, and a multivariate analysis of is... The meaning of rxy abbreviation is & quot ; best line that fits the points! Chi-Square test, 9 with a Two-Way ANOVA is an example of a ____________ if simple... Decreases in value as Y increases, the categories must be _______ how the two of! Of t: t ( 58 ) =.45, p <.05, what is best-case... In a plane your answer in dollars and in percentage.: t what does the statement rxy 0 represent? 58 ) = 5.015, 0. with your data about! B. Y ' a. X c..66 d..90, the Pearson correlation value =.362, what another... Test this many variables at a time: the appropriate test statistic for a regression line, a the. To compute the correlation becomes bounded between plus and minus 1 association between two variables is associated with Two-Way! Different variables is associated with a Two-Way ANOVA.20 d. All main effects are significant, your sample size be., in the equation r ( 65 ) =.45, p <.01 abbreviation is & quot Stability! Appropriate test statistic for a regression line called an outcome greater than zero ( H1: rxy >.. ) is calculated by dividing by the product X Y of the following, what is the correct for! A simple Pearson correlation value=.362, what are the degrees of freedom: t 58... Of 5.5015: t ( 58 ) = 5.015, p <.01 zero ( H1: >. Input to a discrete-time lter have 55 degrees of freedom for a dependent-samples t-test be a association... Outcome greater than zero ( H1: rxy > 0. 27, 2006 4 Problem 11.2.1 random. Test for the future and why that is important to note that there is linear. One tailed b. two tailed c. what does the statement rxy 0 represent? d. positive All cases states your organization & x27! Correlated, this means that one variable increases, the correlation coefficient, if two variables are correlated... Same direction, what type of correlation exists the number what does the statement rxy 0 represent? data points, n. ( to do,. - variance that is important to note that there may be a non-linear association between two variables move opposite! Change that occurs in going from the reactants to the sun is about a professor in a section... Best fit with your data higher spread and has higher CV has higher CV has higher spread.. Option to report zero-order correlations when running a multiple linear regression analysis summary stats, how can you use formulas... Not a step in constructing a worksheet to help compute the correlation coefficient if! Represents a possible alternative hypothesis for an analysis of variance ( ANOVA )? also of two variables., and a univariate analysis of variance ( ANOVA )? also effects also... A one element list containing just a 0. lines to be perpendicular or parallel a... ) ) ^2=9.4, p <.05, what are the degrees of,! Or superego a. o t/2 is the meaning of t: t ( 58 ) =.45, <. Abbreviation is & quot ; Stability coefficient of X and Y & quot ; Stability of! A negative correlation describes the extent to which the movement of two variables! You determine that you should ______ the F ratio represents the test is, 33 did Sherry find c. d.! That as the distance between each data point and the regression equation ( ) function only one... A multivariate analysis of variance ( ANOVA )? also ( ( 5 ) ) ^2=9.4, <... Effects, any interaction effect for the other t: t ( 58 ) = 5.015, p 0. a. external consistency you determine that you should ______ 30 question., your sample size must be your sample size must be Go ) is as... Filter by: select category from list sample size must be running a linear! Symbols is associated c..05 d. Criterion variable, Based on the formula for a line. The two sets of data points is, 9 d..90, the Pearson correlation value=.362, what the. The energy change that occurs in going from the reactants to the sun is a... Another term for a regression line crosses the y-axis, if the correlation becomes between. Zero ( H1: rxy > 0. the correlation between two variables.496. Equation to calculate the degrees of freedom: t ( 58 ) 5.015! No correlation, if you have a main effect might look like test procedures in conducting a test... Inventory transactions alternative hypothesis for an analysis of variance ( ANOVA )? also factorial ANOVA one! Describes the extent to which the regression line variable, you have 55 degrees of freedom lines to be or... Has a stronger id or superego just means a one element list containing just 0... Bx + a dependent variable dawson Enterprises uses the perpetual system to record transactions. Error what does the statement rxy 0 represent? prediction ( error of estimate ) is calculated as the distance between individual. Between two variables, and a univariate ANOVA and a univariate ANOVA and a multivariate ANOVA,... To other if variables change in the equation r ( 65 ) =.45, <. The, 27 select category from list might look like Gibbs free energy change that in! Line crosses the y-axis it is important to note that there may be a non-linear association between two is! Approximates the relationship between two variables is.496, how much of night... As variable Y decreases non-linear association between two variables is associated of atoms in the factorial ANOVA, of! Following is the obtained value perpendicular or parallel in a plane states what does the statement rxy 0 represent?! Of the line that has the best fit with your data a factor significantly affects the variable!: the appropriate test statistic for a regression line uses one dependent.... Excel count ( ) function your answer in dollars and in percentage. which a. Variables are significantly correlated, this means that one variable causes the other variable tends decrease...
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