Greetings, tutors. I'm taking my final test in Stats, and I'd really like to know if my answers are correct. Would you be able to help me with this? Even though I've already taken the test, I want to make sure I'm 100% certain. I appreciate your help. ------ 1. The correlation coefficient __________________

a. measures the strength of linear relationship between two variables b. has the same slope as the covariance c. has no units

d. All the above 2. ___________________ indicates the strength of association between the dependent and independent variables in linear regression a. variance inflation factor b. R square c. ANOVA d. Standard error e. Psychological influence 3. A one-tailed test is employed when the alternate hypothesis ________ a. is a structured "=" b. falls in the middle of the distribution c. specifies a direction of relationship d. is structured a "?" e. both b and c

4. The correlation coefficient is a number between a. -2 and +2

b. -1 and 0

c. -1 and +1

d. 0 and +1 5. Which of the following is not true when speaking of covariance a. it is an average

b. it is unitless

c. it inherits the units for x and y

d. b and d

6. The coefficient of determination represents a. the percentage of total deviations that can be explained

b. the percentage of deviations that are expected

c. R2

d. All of the above 7. A recent study focused on the number of times men and women who live alone buy take-out dinners in a month. Two samples were taken with the following results:

	men	women
mean	24	22
standard deviation	4	3
sample size	35	40

At the 0.05 significance level, is there a difference in the mean number of times men and women order take -out dinners in a month? 8. The rejection region is defined by ______

a. a critical value

b. the sample size

c. the power of the test

d. the probability of type II error

e. the probability of a false negative 9. Analysis of Variance is used for: a. one sample

b. two samples

c. three or more samples

d. none of the above

10. Before and after studies are: a. paired samples

b. longitudinal

c. dependent samples

d. pooled samples e. all of the above

11. Pythagoras theorem (hypotenuse) is used with: a. the standard error of dependent samples

b. the standard error in longitudinal studies

c. never randomly.

d. the standard error of independent samples e. both b and c

12. In general, whenever p-value is less than ?, _____________

a. we choose a different level of significance

b. we reject the null hypothesis

c. the hypothesis test is inconclusive

d. we fail to reject the null hypothesis

e. all of the above

13.

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