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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 $2000 and a standard deviation of $150. Complete parts (a) and (b) below.
a. Construct a 99% confidence interval estimate for the mean spending for all shoppers who are members of the website's premium program.
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(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 99% of all samples of 96 members of the website's premium program will be between the lower and upper limits of the confidence interval.
B.99% 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 99% 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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