1. Assuming the population is large, which sample size will give the smallest standard deviation to the statistic?
A. n = 100
B. n = 500
C. n = 1000
2. A researcher is studying the effects of a new drug on reducing high blood pressure. He recruits 250 men to test the new active drug against a current standard. At the end of six weeks, the decrease in systolic blood pressure will be evaluated. He believes the drug will be more effective for black men than for white men. To properly test his belief, the experiment should be
A. completely randomized.
B. double-blind.
C. blocked.
3. I want to take a survey of students currently enrolled in my statistics course. There are 250 of them, so I number them alphabetically from 001 to 250. Use the portion of the random number table below to select the numbers for the first five to be interviewed.
69041 65817 87174 09514 8174 06423 93758 23612 17894
A. 690, 416, 581, 787, 174
B. 174, 095, 148, 064, 239
C. 174, 095, 148, 174, 064