(Solution) - You research repair costs of computers and find that the -(2025 Original AI-Free Solution)

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You research repair costs of computers and find that the population standard deviation is $50. Repeat Exercise 20, using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results.
Exercise 20
In a random sample of seven computers, the mean repair cost was $110.00 and the standard deviation was $44.50.