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% 25% 13% 11% For the 62-and-over group, use the midpoint 67 years. (c) Compute the expected age ? (in years) of a super shopper. ? = years (d) Compute the standard deviation ? (in
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% 25% 13% 11% For the 62-and-over group, use the midpoint 67 years. (c) Compute the expected age ? (in years) of a super shopper. ? = years (d) Compute the standard deviation ? (in
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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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 |
18-28 | 29-39 | 40-50 | 51-61 | 62 and over |
|---|---|---|---|---|---|
| Midpoint x | 23 | 34 | 45 | 56 | 67 |
| Percent of super shoppers | 10% | 41% | 25% | 13% | 11% |
For the 62-and-over group, use the midpoint 67 years.
(c)
Compute the expected age ? (in years) of a super shopper.
? = years
(d)
Compute the standard deviation ? (in years) for ages of super shoppers. (Round your answer to two decimal places.)
? = years
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