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A local plumber makes house calls. She charges $30 to come out to the house and $40 per hour for
her services. For example, a 4-hour service call costs $30 + $40(4) = $190.


A. Statistic Hours of Service Call Cost of Service Call

Mean 4.5 30+40(4.5) = 210

Median 3.5 30+40(3.5) = 170

SD 1.2 40(1.2) = 48

IQR 2.0 40(2.0) = 80

Minimum 0.5 30+40(0.5) = 50

Do these summary statistics indicate that a Normal model is appropriate here? Explain.



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