A computer manufacturing company has sent a mail survey to 2,800 of its randomly selected customers that have purchased a new laptop. The survey asked the customers whether or not they were satisfied with the computer. Eight hundred customers responded to the survey: 640 customers indicated that they were satisfied, while 160 customers indicated they were not satisfied with their new computer. Construct a 96 percent confidence interval estimate of the true proportion of customers satisfied with their new computer.
A) [.771, .829]
B) [.788, .812]
C) [.775, .825]
D) [.785, .816]

Question

Quizplus · Accepted Answer

± 2.05= .8 ± 2.05(.0141) = (.7711 to .8289)

A Computer Manufacturing Company Has Sent a Mail Survey to 2,800