Question

A company that produces stereo equipment for home listening is interested in the average age of the equipment in the homes of so-called baby boomers. A random sample of 60 baby boomer households was surveyed. The average age of their stereo equipment was 8.9 years, with a standard deviation of 5.5 years. The data appear to be normally distributed. Do the data contradict the company's idea that most baby boomer households have stereo equipment that is at least 10 years old? Use α = 4%.


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  • CreatedJuly 12, 2015
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