statistics
posted by Brodice .
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.
a) What proportion of the samples will have less than 15% of customers who will make a purchase after visiting the web site?
a)
______________
b) What proportion of the samples will have between 20% and 30% of customers who will make a purchase after visiting the web site?
b)
______________
c) The standard deviation of all the sample proportions of customers who will make a purchase after visiting the web site is ________.
c)
______________
d) The average of all the sample proportions of customers who will make a purchase after visiting the web site is ________.
d)
______________
e) 90% of the samples will have more than what percentage of customers who will make a purchase after visiting the web site?
e)
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