If 75% of all families spend more than $75 weekly for food, while 15% spend more than $150.
a...
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Mathematics, 21.01.2020 17:31 rebekahlm
If 75% of all families spend more than $75 weekly for food, while 15% spend more than $150.
assume the weekly expenditure األسبوعي االنفاق of all families has roughly a bell-shaped
distribution ,
i. what is the mean weekly expenditure and what is the standard deviation ?
ii. what is the probability that a randomly selected family spend more than $130 ?
iii. ninety-five percent of weekly expenditure will be below what value?
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Answers: 1
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