7 Answer
(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.
What proportion of the samples will have between 20% and 30% of customers who will make a purchase after visiting the web site?Let
P(Z -0.99) = 0.1611, P(Z< 2.97) = 0.9985,P(Z < 0.3) 0.6179, P(Z 2.71) = 0.9966.
A. 0.1596
B. 0.8404
C. 0.4728
D. 0.5272
Finish
