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. Given this information, what is the critical value?A) z = 1.645
B) t = 1.96
C) z = 1.96
D) Can't be determined without knowing the results of the sample.
Question 2
R-charts are ________ if the calculations are done manually by a process worker on the factory floor.
A) more accurate than charts based on the standard deviation
B) more useful than x-charts
C) the only way to determine if a process is under control
D) easy to construct and use
National lead measurements, 1984 - 2008