In a Random Sample of 60 Computers, the Mean Repair

question 58

Multiple Choice

In a random sample of 60 computers, the mean repair cost was $150. Assume the population standard deviation is $36. Construct a 90% confidence interval for the population mean.

• A)($142, $158)
• B)($138, $162)
• C)($141, $159)
• D)($537, $654)

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