A marketing researcher wants to estimate the mean amount spent ($) on a certain retail website by members of the website's premium program. A random sample of 99 members of the website's premium program who recently made a purchase on the website yielded a mean of $1600 and a standard deviation of $150. Complete parts (a) and (b) below. RECEN a. Construct a 90% confidence interval estimate for the mean spending for all shoppers who are members of the website's premium program. Πεμ Π (Round to two decimal places as needed.)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A marketing researcher wants to estimate the mean amount spent ($) on a certain retail website by members of
the website's premium program. A random sample of 99 members of the website's premium program who recently
made a purchase on the website yielded a mean of $1600 and a standard deviation of $150. Complete parts (a)
and (b) below.
BECEIP
a. Construct a 90% confidence interval estimate for the mean spending for all shoppers who are members of
the website's premium program.
☐³μs
(Round to two decimal places as needed.)
Transcribed Image Text:K A marketing researcher wants to estimate the mean amount spent ($) on a certain retail website by members of the website's premium program. A random sample of 99 members of the website's premium program who recently made a purchase on the website yielded a mean of $1600 and a standard deviation of $150. Complete parts (a) and (b) below. BECEIP a. Construct a 90% confidence interval estimate for the mean spending for all shoppers who are members of the website's premium program. ☐³μs (Round to two decimal places as needed.)
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