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A study conducted a few years ago claims that the adult males spend an average of...

A study conducted a few years ago claims that the adult males spend an average of 11 hours a week watching sports on television. A recent sample of 100 adult males showed that the mean time they spend per week watching sports on television is 9.50 hours with a standard deviation of 2.2 hours.

a. Use the result to give a 95% confidence interval for the mean time they spend per week watching sports on television.

a. Does the study give good evidence that all adult males spend less than 11 hours per week watching sports on television? (Hint: apply the 4-step process of hypothesis testing)

Math   Statistics-And-Probability   
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