6. If other factors are held constant, what is the effect of increasing the sample variance? A. It will increase the estimated standard error and increase the likelihood of rejecting the null hypothesis. B. It will increase the estimated standard error and decrease the likelihood of rejecting the null hypothesis. C. It will decrease the estimated standard error and increase the likelihood of rejecting the null hypothesis. D. It will decrease the estimated standard error and decrease the likelihood of rejecting the null hypothesis. 7. A sample has M = 72 and s = 4. In this sample, what is the X-value corresponding to z = -2.00? A. X = 70 B. X = 68 C. X = 64 D. X = 60 8. Two samples from the same population both have n = 10 scores with M = 45. If the t statistic is computed for each sample, then what is the relationship between the two t values? A. the two t statistics will be identical B. the sample with the larger variance will produce the larger t statistic C. the sample with the smaller variance will produce the larger t statistic D. None of the above are correct statements 9. A distribution with M = 35 and s = 8 is being standardized so that the new mean and standard deviation will be M = 50 and s = 10. In the new, standardized distribution your score is X = 45. What was your score in the original distribution? A. X = 30 B. X = 31 C. X = 39 D. X = 45 10. Last week Sarah had exams in Math and in Spanish. On the Math exam, the mean was M = 30 with s = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was M = 60 with s = 8 and Sarah had a score of X = 68. For which class should Sara expect the better grade? A. Math B. Spanish C. The grades should be the same because the two exam scores are in the same location. D. There is not enough information to determine which is the better grade. 11. For a sample with M = 80, a score of X = 88 corresponds to z = 2.00. What is the sample standard deviation? A. 2 B. 4 C. 8 D. 16 12. On an exam with M = 52, you have a score of X = 44. Which value for the standard deviation would give you the highest position in the class distribution relative to the rest of the students? A. S=2 B. S=4 C. S=8 D. Cannot Determine 13. What kind of frequency distribution graph shows the frequencies as bars that are separated by spaces? A. a bar graph B. a histogram C. a polygon D. a line graph 14. For a sample with M = 50 and s = 12, what is the X-value corresponding to z = -0.25? A. 47 B. 53 C. 46 D. 54 15. Which of the following describes what a confidence interval does? A. It uses a sample mean to estimate the corresponding population mean. B. It uses a population mean to predict a sample mean. C. It uses a level of confidence to estimate a sample mean. D. It uses the sample mean to determine a level of confidence