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In a large group of young couples, the stan- dard deviation of the husbands' ages is four years, and that of the wives' ages is three years. Let D denote the age difference within a couple. Under what circumstances might you expect to find that the standard deviation of age differences in the group is about 5 years? Instead you find it to be 2 years. One possibility is that the discrepancy is the result of random variability. Give another explanation.

In a large group of young couples, the stan- dard deviation of the husbands' ages is four years, and that of the wives' ages is three years. Let D denote the age difference within a couple. Under what circumstances might you expect to find that the standard deviation of age differences in the group is about 5 years? Instead you find it to be 2 years. One possibility is that the discrepancy is the result of random variability. Give another explanation.

MATLAB: An Introduction with Applications
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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In a large group of young couples, the stan- dard deviation of the husbands' ages is four years, and that of the wives' ages is three years. Let D denote the age difference within a couple. Under what circumstances might you expect to find that the standard deviation of age differences in the group is about 5 years? Instead you find it to be 2 years. One possibility is that the discrepancy is the result of random variability. Give another explanation.
Transcribed Image Text:In a large group of young couples, the stan- dard deviation of the husbands' ages is four years, and that of the wives' ages is three years. Let D denote the age difference within a couple. Under what circumstances might you expect to find that the standard deviation of age differences in the group is about 5 years? Instead you find it to be 2 years. One possibility is that the discrepancy is the result of random variability. Give another explanation.
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