Which of the following values of the correlation coefficient indicates the strongest relationship? a. -.95 b. 0 c. .01 d. .05 e. .90 32. Which of the following statements is true? a. Correlation always implies causation b. The coefficient of c31. Which of the following values of the correlation coefficient indicates the strongest relationship?

a. -.95

b. 0

c. .01

d. .05

e. .90

32. Which of the following statements is true?

a. Correlation always implies causation

b. The coefficient of correlation ranges between 0 and 1

c. In simple linear regression there is only one predictor

d. The Pearson product moment coefficient of correlation requires the relationship between the

dependent and independent variables to be non-linear

e. None of the above

33. Assuming that causation exists, if the coefficient of correlation is .5 then it means that:

a. the coefficient of determination is .71

b. association is negative

c. 25% of the variation in the dependent variable can be explained by the variation in the

independent variable

d. 25% of the variation in the independent variable can be explained by the variation in the

dependent variable

e. none of the above

34. The following assumption is not required for a paired samples t test:

a. Independence

b. Normality

c. Equality of variances

d. None of the above. All three assumptions are required.

35. A researcher interested in investigating the difference in attitudes towards foreigners between those who have a high school education or less, and those who have more than high school education. Which of the following experimental designs should the researcher choose?

a. One sample t test

b. Paired samples t test

c. Independent samples t test

d. Multiple regression

e. All of the above

36. Variables X and Y would be considered perfectly correlated for following values of coefficient of correlation r:

I. r = -1

II. r=0

III. r = +1

a. I only

b. II only

c. III only

d. I, II and III

e. None of the above

37. Two variables X and Y are said to be positively correlated if:

a. Increase in X causes a decrease in Y

b. Decrease in X causes a decrease in Y

c. One of the variables changes but the other always stays constant

d. a and b are both true

e. None of the above statements is true