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Suppose that the income of families in a large community follows a normal distribution. Two families are randomly selected and their incomes are $55,000 and $85,000, respectively. The two incomes correspond to z-scores of -0.5 and 2.0 respectively. Calculate the mean and standard deviation of the income of families in the neighborhood.

Suppose that the income of families in a large community follows a normal distribution. Two families are randomly selected and their incomes are $55,000 and $85,000, respectively. The two incomes correspond to z-scores of -0.5 and 2.0 respectively. Calculate the mean and standard deviation of the income of families in the neighborhood.

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
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17. Suppose that the income of families in a large community follows a normal distribution. Two families are randomly selected and their incomes are $55,000 and $85,000, respectively. The two incomes correspond to z-scores of -0.5 and 2.0 respectively. Calculate the mean and standard deviation of the income of families in the neighborhood. 8. Suppose that the 30th percentile of a normal distribution is equal to 756 and that the 90th percentile of this normal distribution is 996. Find the mean and standard deviation of the normal distribution. slugog or to od 0801 ml
Transcribed Image Text:17. Suppose that the income of families in a large community follows a normal distribution. Two families are randomly selected and their incomes are $55,000 and $85,000, respectively. The two incomes correspond to z-scores of -0.5 and 2.0 respectively. Calculate the mean and standard deviation of the income of families in the neighborhood. 8. Suppose that the 30th percentile of a normal distribution is equal to 756 and that the 90th percentile of this normal distribution is 996. Find the mean and standard deviation of the normal distribution. slugog or to od 0801 ml
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