ooo TMobile LTE 741 PM coursesapexlearningcom Question 5 of

ooo T-Mobile LTE 7:41 PM courses.apexlearning.com Question 5 of 42 Multiple Choice: Please select the best answer and click submit. Phone company A conducted a study that showed 97% customer satisfaction, with a standard deviation of 1%. The sample included 25 people who appeared in one of their commercials, during the past 3 years. Phone company B conducted a study that showed 94% customer satisfaction, with a standard deviation of 4%. The random sample consisted of 100 new customers. Which of the company claims is more believable and why? O A Phone company B because the standard deviation is arger O B. Phone company B because the sample was not O C. Phone company A because the standard deviation is O D. Phone company A because the time span was longer biased. smaller. Page

Solution

It appears Survey A is biased due to sampling from those who worked on commercials for them (and were thus paid and obviously were happy enough to sign up for the commercial). The Survey A these issues. First of all you wouldn\'t be sure they actually asked any of their customers, just people that appeared in their commercial.

Hence option B should be correct.