What is the income distribution of super 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. In the following table, income units are in thousands of dollars, and each
What is the income distribution of super 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. In the following table, income units are in thousands of dollars, and each
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 income distribution of super 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. In the following table, income units are in thousands of dollars, and each interval goes up to but does not include the given high value. The midpoints are given to the nearest thousand dollars.
| Income |
5-15 | 15-25 | 25-35 | 35-45 | 45-55 | 55 or more |
| Midpoint x | 10 | 20 | 30 | 40 | 50 | 60 |
| Percent of super shoppers | 20% | 13% | 21% | 17% | 19% | 10% |
1. Compute the expected income ? of a super shopper. (Round your answer to two decimal places.)
? = ____ thousands of dollars
2. Compute the standard deviation ? for the income of super shoppers. (Round your answer to two decimal places.)
? = _____ thousands of dollars
Transcribed Image Text:What is the income distribution of super 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. In the following table, income units are in thousands of dollars, and each interval goes up to but does not include the given high value. The midpoints are given to the nearest
thousand dollars.
Income range
5-15
15-25
25-35
35-45
45-55
55 or more
Midpoint x
Percent of super shoppers
10
20
30
40
50
60
20%
13%
21%
17%
19%
10%
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