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Imagine you collect a sample of sales data from 20 people in your company and the...

Imagine you collect a sample of sales data from 20 people in your company and the sample average sales per person is $8900 per month. The estimated sample standard deviation is $1000. If the true mean of sales per month across the whole company is $10000, how probable is it that your sample mean would be MORE EXTREME than $8900 per month.

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