According to a Hospital Administrator, Historical Records Over the Past

Multiple Choice

According to a hospital administrator, historical records over the past 10 years have shown that 20 percent of the major surgery patients are dissatisfied with after-surgery care in the hospital. A scientific poll based on 400 hospital patients was conducted and 64 patients indicated that they were dissatisfied with the after-surgery care. What are the mean and the standard deviation of the sampling distribution of ?

A) 16% and .034%
B) 20% and 1.83%
C) 20% and 2%
D) 20% and .034%
E) 20% and 16%