Mathematics, 01.09.2021 09:30, luhhbitilia566

You take random sample of 200 people from Salinas and find that their average income is $48,000 per year with a standard deviation of $9000. Also assume that population incomes are normally distributed.
Approximately how many people make between $39,000 and $57,000?
X
Answer format: Enter a positive integer

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You take random sample of 200 people from Salinas and find that their average income is $48,000 per...