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)=(\Bar X -\mu)/(\sigma)\\\\Z_(score)=(29876.76-34893.71)/(1000)\\\\=(-5016.95)/(1000)\\\\=-5.01695\\\\=-5.02`

So, Tuesday Z-Score= -5.02