What is the age distribution of promotion-sensitive shoppers? A supermarket super shopper is defined as a shopper for whom at least 70% of the items purchased were on sale or purchased with a coupon. Age range, years 18-28 29-39 40-50 51-61 62 and over Midpoint x 23 34 45 56 67 Percent of super shoppers 10% 41% 19% 9% 21%   Compute the expected age ? of a super shopper. (Round your answer to two decimal places.) ? =______ yr   Compute the standard deviation ? for ages of super shoppers. (Round your answer to two decimal places.) ? = ______yr

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.