Answered: What is the age distribution of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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%	47%	23%	9%	11%

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

(a)Using the age midpoints x and the percentage of super shoppers, do we have a valid probability distribution? pick correct answer:

-No. The events are indistinct and the probabilities sum to more than 1

-No. The events are distinct and the probabilities sum to 1.

-Yes. The events are distinct and the probabilities do not sum to 1.

-Yes. The events are distinct and the probabilities sum to 1.

-Yes. The events are indistinct and the probabilities sum to less than 1.

b) Compute the expected age ? of a super shopper. (Round your answer to two decimal places.)

? = yr

c) Compute the standard deviation ? for ages of super shoppers. (Round your answer to two decimal places.)

? = yr

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