Stat 160 Prequiz over Section 9.3 and 9.4



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1. Which of the following is an estimate of location shift?

A. Difference in sample means
B. Difference in sample medians
C. Difference in sample variances
D. Both A and B.
2. I have two samples with outliers present. Which of the following procedure(s) would be most appropriate?

A. Difference in sample means
B. Difference in sample variances
C. The Wilcoxon
D. Both A and B
3. During the spring of 2002, 100 out of 250 WMU students said they were going to Florida for spring break. During the spring of 2003, 80 out of 230 WMU students stated they were going to Florida for spring break. What is my estimate for the difference in proportions (p-hat) between 2002 and 2003?

.4
.052
.347
.6
4. In the example in Section 9.4, there are 39 1's and 13 0's for X. What do the 0's mean?

Those not cured for Drug I.
Those cured for Drug I.
Those cured for Drug II.
Those not cured for Drug II.