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made a purchase on the website yielded a mean of $ 2 0 0 0 and a standard deviation of $ 1 5 0 .
made a purchase on the website yielded a mean of $ and a standard deviation of $ Complete parts a and b below.
a Construct a confidence interval estimate for the mean spending for all shoppers who are members of the website's premium program.
Round to two decimal places as needed.
b Interpret the interval constructed in a
Choose the correct answer below.
A The sample mean spending in of all samples of members of the website's premium program will be between the lower and upper limits of the confidence interval.
B of all shoppers who are members of the website's premium program have spent an amount in dollars that is between the lower and upper limits of the confidence interval.
D With confidence, the mean spending in dollars for all shoppers who are members of the website's premium program is between the lower and upper limits of the confidence interval.
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