A random selection of 103 sales invoices from a store's sales invoices during July yields a sample mean of $104.14 with a sample standard deviation of $28.52. The 95% confidence interval for the mean amount of all the store's sales invoices in July is: A: from $101.33

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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A random selection of 103 sales invoices from a store's sales invoices during July yields a sample mean of $104.14 with a sample standard deviation of $28.52. The 95% confidence interval for the mean amount of all the store's sales invoices in July is:

A: from $101.33 to $106.95

B: from $98.52 to $109.76

C: from $75.62 to $132.66

D: from $47.10 to $161.18

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