Would it be appropriate to compute a 95% confidence interval for the population standard deviation of the costs? If so, compute it. If not, explain why not.
Refer to Exercise 24. A sample of six repair records for a different type of component was drawn. The repair costs, in dollars, were as follows.
93 97 27 79 81 87
It is not appropriate. The sample contains an outlier, which suggests that the population is not normal.
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