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# Degrees of Freedom - Car Wash

STATS-G4K08H

The manager of a car wash facility believes that cars arriving at his car wash facility follow a Normal distribution. He collected a random sample of cars that arrived each hour from 9:00 am to 7:00 pm. He estimated the mean and standard deviation of the car arriving population.

What is the number of degrees of freedom for this goodness-of-fit test?

A

$7$

B

$8$

C

$9$

D

$6$