Question: 28
(Choose 1 answer)
According to a survey, only 15% of customers who visited the web site of a major retail store made a
purchase. Random samples of size 50 are selected.
The standard deviation of all the sample proportions of customers who will make a purchase after visiting the
web site is
A. 0.05050
B. 0.08552
C. 0.4045
D. 0.2572
E. None of the other choices is correct
