12. A survey of 30 adults found that the mean age of a person's primary vehicle is 5.6 yeas. Assuming the standard deviation of the population is 0.8 year, find the 99% Confidence interval of the population mean. Interpret your answer.

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12. A survey of 30 adults found that the mean age of a person's primary vehicle is 5.6 years.
Assuming the standard deviation of the population is 0.8 year, find the 99% confidence
interval of the population mean. Interpret your answer.
Transcribed Image Text:12. A survey of 30 adults found that the mean age of a person's primary vehicle is 5.6 years. Assuming the standard deviation of the population is 0.8 year, find the 99% confidence interval of the population mean. Interpret your answer.
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