College X Is Concerned About Their Employees Making Use of Their

Multiple Choice

College X is concerned about their employees making use of their email for non-business purposes.
A random sample of 400 e-mails discovered 80 messages that were not business related. The 90%
Confidence interval for the population proportion is:

A) 0.167 to 0.233
B) 0.161 to 0.239
C) 0.148 to 0.252
D) 0.186 to 0.254
E) 0.179 to 0.261