An advertising company has developed a new ad for one of the national car manufacturing companies. The ad agency is interested in testing whether the proportion of favorable response to the ad is the same between male adults versus female adults. It plans on conducting the test using an alpha level equal to 0.05. A sample of 100 adults of each gender will be used in the study. Each person will be asked to view the ad and indicate whether they find the ad to be "pleasing" or not. The samples resulted in 57 males that liked the ad and 47 females that liked the ad. Based on this information, what is the value of the test statistic?
A) z = 1.645
B) z = 1.42
C) t = 2.234
D) z = 1.024

Question

Quizplus · Accepted Answer

The test statistic for comparing two proportions is calculated using the formula for the z-test. Given the sample sizes and the number of positive responses, the calculation would involve the difference in sample proportions relative to the standard error of the difference in proportions. The correct answer, based on these calculations, is z = 1.42.

An Advertising Company Has Developed a New Ad for One