What is the age distribution of promotion-sensitive shoppers? Asupermarket super shopperis defined as a shopper for whom at least 70% of the items purchased were on sale or purchased with a coupon.

Age range, years18-2829-3940-5051-6162 and overMidpointx2334455667Percent of super shoppers8%43%25%13%11%

For the 62-and-over group, use the midpoint 67 years.

(c) Compute the expected ageof a super shopper. (Round your answer to two decimal places.)

=yr

(d) Compute the standard deviationfor ages of super shoppers. (Round your answer to two decimal places.)

=yr