College X is concerned about their employees making use of their email for non-business purposes. A random sample of 400 e-mails discovered 70 messages that were not business related. The 95%
Confidence interval for the population proportion is:
A) 0.1378 to 0.2122
B) 0.101 to 0.199
C) 0.1206 to.1902
D) 0.0753 to 0.1247
E) 0.1300 to 0.2100

Question

Quizplus · Accepted Answer

The 95% confidence interval for the population proportion is 0.1378 to 0.2122. This means that we are 95% confident that the true proportion of non-business emails sent by College X employees is between 0.1378 and 0.2122.

College X Is Concerned About Their Employees Making Use of Their