A powerful women's group has claimed that men and women differ in attitudes about sexual discrimination. A group of 50 men (group 1 ) and 40 women (group 2 ) were asked if they thought sexual discrimination is a problem in the United States. Of those sampled, 11 of the men and 19 of the women did believe that sexual discrimination is a problem. Which of the following tests will you use to find out if there is any difference in attitudes about sexual discrimination?
A) Wilcoxon rank sum test B) Z test for difference in proportions
C) Pooled-variance t test D) Paired t test
Question 2
A buyer for a manufacturing plant suspects that his primary supplier of raw materials is overcharging. In order to determine if his suspicion is correct, he contacts a second supplier and asks for the prices on various identical materials. He wants to compare these prices with those of his primary supplier. He collected data on 6 different materials from both suppliers. He believes that the differences are normally distributed. Which of the following tests will be the most appropriate?
A) Wilcoxon rank sum test B) Pooled-variance t test
C) McNemar test D) Paired t test
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