MATLAB: An Introduction with Applications
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Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:4.
A study of working couples measures the income X of the husband and the income Y of the wife in a
large number of couples in which both partners are employed. Suppose that you knew the mean Hx
and the variances af and a? of both variables in the population
and
Нy
Is it reasonable to take the mean of the total income X + Yto be ux + ply? Explain your answer.
а.
Is it reasonable to take the variance of the total income to be af + af? Explain your answer
b.
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