If a simple pearson correlation value = .512, what percentage of variance is accounted for?

1. What does the letter t represent in the following: t(58) = 2.001, p (Points : 2)

test statistic t-value degrees of freedom significance level

Question 2. 2. What does the number 2.001 represent in the following: t(58) = 2.001, p (Points : 2)

test statistic t-value degrees of freedom significance level

Question 3. 3. A measure of how different two groups are from one another is the __________. (Points : 2)

error size significance level effect size mean scores

Question 4. 4. When computing effect size, the sample size is ________. (Points : 2)

used in the denomenator not taken into account used in the numerator sometimes taken into account

Question 5. 5. If you want to examine one group of subjects under two different conditions, which statistical techniques should you select? (Points : 2)

Regression Dependent samples t-test Analysis of Variance Independent samples t-test

Question 6. 6. What is another name that statisticians talk about dependent tests? (Points : 2)

Regression Correlation Repeated Measures Group Differences

Question 7. 7. In the formula that computes a t value, what does nSD represent? (Points : 2)

sum of the difference between groups sum of the means for group one sum of the means for group two sum of the squared differences

Question 8. 8. The test statistic calculated by the statistical procedure selected is known as the ___________. (Points : 2)

cricial value significance level obtained value p value

Question 9. 9. If the obtained value is less than the critical value, what should you do? (Points : 2)

reject the null hypothesis accept the null hypothesis accept the research hypothesis decrease your p value

Question 10. 10. How many subjects were examined based on the following: t(29) = 2.001, p (Points : 2)

29 30 31 32

Question 11. 11. What is another name for a dependent samples t-test? (Points : 2)

Single sample Double sample Paired sample Freed sample

Question 12. 12. Which of the following represent degrees of freedom? (Points : 2)

fd df d f

Question 13. 13. What is the numerator of the t-test for Dependent means formula? (Points : 2)

SD n M1-M2 SD2 (n-1)

Question 14. 14. In the equation t (78) = 1.03, p (Points : 2)

test statistic degrees of freedom obtained value alpha level

Question 15. 15. Which of the following is the same as t2 when examining the difference between two groups? (Points : 2)

F t Cohen's d F2

Question 16. 16. What type of ANOVA is used when there is only one type of treatment or grouping factor with more than two levels? (Points : 2)

One-way Two-way Three-way Four-way

Question 17. 17. If you wanted to examine whether the level of parental involvement differs based on students' grade in school (i.e. 1st, 2nd, 3rd, etc.), what is the dependent variable of interest? (Points : 2)

Grade level Students Parents Level of parent involvement

Question 18. 18. Which of the following is the formula for computing the F statistic? (Points : 2)

F = MSbetweem / MSwithin F = SSbetweem / SSwithin F = MSwithin / MSbetweem F = SSwithin / SSbetweem

Question 19. 19. The variability between groups is due to ______________. (Points : 2)

chance the grouping factor the F ratio the level of the dependent variable

Question 20. 20. When you compute the sum of the differences between each individual score and the group mean, you have calculated the _____________. (Points : 2)

MS within SS within MS between SS between

Question 21. 21. When interpreting F (2, 27) = 8.80, p (Points : 2)

30 27 3 2

Question 22. 22. When interpreting F (2, 27) = 8.80, p (Points : 2)

30 29 3 2

Question 23. 23. In a 4 x 3 factorial design, there are how many levels of the second grouping factor? (Points : 2)

3 4 7 12

Question 24. 24. ANOVA first tests for an overall difference between the means. This is known as what type of test? (Points : 2)

omnibus pluribus omnivorous omnibor

Question 25. 25. ANOVA with replication is also known as ___________. (Points : 2)

Repeated measures Between group design Mixed design One-way ANOVA

Question 26. 26. When type of design includes an ANOVA where one factor is repeated and the other is not? (Points : 2)

Repeated design Between groups design Mixed design One-way ANOVA

Question 27. 27. When analysis of data reveals a difference between levels of a factor, what is this called? (Points : 2)

Interaction effect Factor effect Level effect Main effect

Question 28. 28. Results from an ANOVA are placed in what type of table? (Points : 2)

ANOVA table Source table Effects table Output table

Question 29. 29. Which of the following would be an example of a design that examines the effects gender and SES ( high SES and low SES) on a test of student achievement? (Points : 2)

One-way ANOVA 2 x 2 ANOVA Multivariate ANOVA 3 x 2 ANOVA

Question 30. 30. When you are interested in finding out if students' achievement level changes over time as result of a reading intervention, what type of ANOVA would you use? (Points : 2)

Repeated measures Between groups design Mixed design One-way ANOVA

Question 31. 31. What type of ANOVA would examine effects of political party (eg. democrat, republican, or independent) affiliation and gender on the attitudes toward the death penalty? (Points : 2)

2 x 2 ANOVA 3 x 2 ANOVA 3 x 2 x 1 ANOVA 3 x 3 ANOVA

Question 32. 32. Which of the following would be an example of a design that examines the effects gender and school type (i.e. elementary, middle, high school) on a scale of student attitudes toward learning? (Points : 2)

2 x 2 ANOVA 3 x 3 ANOVA 2 x 3 ANOVA Simple ANOVA

Question 33. 33. The effect of one factor is called the _____________. (Points : 2)

interaction effect main effect differential effect experimental effect

Question 34. 34. How many null hypotheses are used in a 2 x2 factorial ANOVA? (Points : 2)

1 2 3 4

Question 35. 35. Measures which occur at the same time are known as what type of measures? (Points : 2)

predictive longitudinal concurrent consecutive

Question 36. 36. What is another term for a positive correlation? (Points : 2)

indirect nondirectional direct unidirectional

Question 37. 37. Which of the following is an example of a null hypothesis for testing a correlation coefficient? (Points : 2)

H1: rxy = 0 H1: rxy > 0 H0: rxy = 0 H0: rxy > 0

Question 38. 38. The level of risk or Type I error typically set for testing the level of significance of a correlation coefficient is which of the following? (Points : 2)

.01 .05 .95 .99

Question 39. 39. Which of the following types of reliability correlates scores on a single measure on two different occasions? (Points : 2)

test-retest inter-rater parallel forms internal consistency

Question 40. 40. If the correlation between two variables is .496, how much of the variance has not been accounted for? (Points : 2)

24.6% 49.6% 50.4% 75.4%

Question 41. 41. If a research hypothesis does not predict the direction of a relationship, the test is __________. (Points : 2)

one-tailed two-tailed direct positive

Question 42. 42. If a simple Pearson correlation value = .512, what percentage of variance is accounted for? (Points : 2)

26% 49% 51% 74%

Question 43. 43. If a simple Pearson correlation value = .362, what percentage of variance is unaccounted for? (Points : 2)

25% 36% 56% 85%

Question 44. 44. If a simple Pearson correlation value = .75, what percentage of variance is unaccounted for? (Points : 2)

25% 44% 56% 75%

Question 45. 45. What statistical technique is used to make predictions of future outcomes based on present data? (Points : 2)

Analysis of variance Repeated measures Linear regression Correlational analysis

Question 46. 46. Which of the following symbols is associated with the predicted score in the regression equation? (Points : 2)

X Y a b

Question 47. 47. Which of the following symbols is associated with the slope in the regression equation? (Points : 2)

X Y a b

Question 48. 48. Which of the following symbols is associated with the y-intercept in the regression equation? (Points : 2)

X Y a b

Question 49. 49. How would you represent the predicted score of Y based on a known value of X? (Points : 2)

y y-intercept Y' Y = Xa

Question 50. 50. Which of the following determines the direction of the regression line? (Points : 2)

intercept predicted score criterion score slope

Question 51. 51. What must be used to examine an outcome that is predicted from two independent variables? (Points : 2)

Multivariate regression Multiple regression Simple regression Complicated regression

Question 52. 52. In the multiple regression formula, what does X2 represent? (Points : 2)

value of the second dependent variable value of the second independent variable value of the criterion variable value of the predicted score

Question 53. 53. If the correlation between X and Y is equal to -1.0, what do we know about the prediction of Y by X? (Points : 2)

It's negative It's postive It's perfect It's direct

Question 54. 54. If you are trying to predict Y scores from X scores, X is referred to as the __________. (Points : 2)

nominal variable dependent variable predictor variable criterion variable

Question 55. 55. The general formula for a regression line is ________. (Points : 2)

a2 + b2 = c2 aX + b = Y bX + a = Y' dX + a = Y'

Question 56. 56. Which of the following is the symbol for summation? (Points : 2)

D h c S

Question 57. 57. Which of the following is the most commonly used nonparametric test? (Points : 2)

t-test ANOVA Chi-Square Mann-Whitney

Question 58. 58. A one-sample chi-square is also known as ________. (Points : 2)

Goodness of fit test Test of independence Wilcoxon rank Mann-Whitney

Question 59. 59. A two-sample chi-square is also known as ________. (Points : 2)

Goodness of fit test Test of independence Wilcoxon rank Mann-Whitney

Question 60. 60. If you have 100 respondents identifying their gender, what would the expected frequency be for each category? (Points : 2)

25 50 75 100

Question 61. 61. Which of the following nonparametric tests is used to compare two independent samples? (Points : 2)

Mann-Whitney Wilcoxon rank Spearman rank Kolmogorov-Smirnov

Question 62. 62. Which of the following nonparametric tests is used to compare the magnitude and direction of differences between two groups? (Points : 2)

Mann-Whitney Wilcoxon rank Spearman rank Fisher's exact

Question 63. 63. Which of the following is the correct formula for calculating the degrees of freedom for a one-sample chi-sqaure? (Points : 2)

n - 1 n - 3 r - 1 r - 3

Question 64. 64. If there are three categories for which you are calculating a one-sample chi-square, what are the degrees of freedom? (Points : 2)

0 1 2 3

Question 65. 65. Nonparametric statistics is known as _______________. (Points : 2)

non-normal statistics distribution-free statistics skewed distribution statistics parametric statistics

Question 66. 66. Which of the following advanced procedures is characterized by the use of more than one dependent variable? (Points : 2)

ANOVA ANCOVA MANOVA Repeated Measures ANOVA

Question 67. 67. Which of the following procedures can be utilized to examine within groups change over time? (Points : 2)

ANOVA ANCOVA MANOVA Repeated Measures ANOVA

Question 68. 68. If you want to equalize initial differences between two groups before examining group difference, what procedure would you use? (Points : 2)

ANOVA ANCOVA MANOVA Repeated Measures ANOVA

Question 69. 69. Which of the following is sometimes referred to as an "umbrella" term for techniques such as Regression, Path Analysis, and Factor Analysis? (Points : 2)

MANOVA EFA ANOVA SEM

Question 70. 70. If a researcher wants to examine the direction of a relationship between two variables such that he/she posits that one variable causes the other, what type of statistical procedure would be used? (Points : 2)

Correlation ANOVA MANOVA Path Analysis

Question 71. 71. Of the following, which procedure is sometimes referred to as a "data reduction" method as it allows a researcher to explore how items on a particular measure cluster together? (Points : 2)

Correlation Factor Analysis Path Analysis MANOVA

Question 72. 72. When is MANOVA most appropriate to use? (Points : 2)

one DV two IVs and one DV two or more DVs more than three IVs

Question 73. 73. In what type of ANOVA, is there one factor on which participants are tested more than once? (Points : 2)

Analysis of Covariance Repeated Measures Multivariate Analysis Path Analysis

Question 74. 74. Which of the following statistical techniques is used when values of more than one variable are used to predict the value of another variable? (Points : 2)

ANOVA EFA MANOVA Mutliple Regression

Question 75. 75. What is Cronbach's alpha used to assess? (Points : 2)

mean differences change over time internal consistency relationships among factors