Question

A department store has average daily sales of $29,876.76. The standard deviation of sales is $1000. On Tuesday, the store sold $34,893.71 worth of goods. Find Tuesday's z score.

Answer 1

Answer with explanation:

Mean$\Bar X$ = $ 29,876.76

Standard Deviation$\sigma$ =  $1000

$\mu$ =$34,893.71

Z-Score Formula

     $Z_{score}=\frac{\Bar X -\mu}{\sigma}\\\\Z_{score}=\frac{29876.76-34893.71}{1000}\\\\=\frac{-5016.95}{1000}\\\\=-5.01695\\\\=-5.02$

So, Tuesday Z-Score= -5.02

 

Answer 2

This should be the correct answer. i hope this helps you out.

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