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find out Z value for given data.

A new article in the Myrtle Beach Sun Times reported that the mean labour cost to repair a colour television is $90 with a standard deviation of $22. Monte's TV Sales and Service finished repairs on two sets this morning. The labour cost for the first was $75 as well as it was $100 for the second. find out z values for each as well as comment on your findings.

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Category:- Statistics and Probability
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