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To estimate average daily sales Chris took a random sample of 18 days of sales and...

To estimate average daily sales Chris took a random sample of 18 days of sales and found that the mean amount of sales per day was $1795 with a standard deviation of $132.

Assuming that daily sales is normal Chris is 95% confident that the  average daily sales is between:

$1729 and $1861

$1734 and $1856

$1727 and $1863

$1741 and $1849
Math   Statistics-And-Probability   
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