A computer company wants to estimate the hours per week adults use computers at

Question

A computer company wants to estimate the hours per week adults use computers at home. In a random sample of 25 adults, the mean length of time a computer was used at home was 5.3 hours with a standard deviation of 1.9 hours. Using the StaCrunch printout below, write out and interpret the 95% confidence interval for the population mean, In a random sample of 1428 high school baseball players, 93 suffered an injury while playing a spot. Using the StatCrunch printout bellow, write out and interpret the proportion of all high school baseball players suffering an injury while playing.

Explanation / Answer

The 95% confidence interval for the true mean hours per week adults use the computers is (4.5157185, 6.0842815). That is we are 95% confident that true mean hours is lies in the interval (4.5157185, 6.0842815).

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The 90% confidence intreval for the proprotion of true baseball player suffered from injury while playing is (0.0544, 0.0759). That is we are 90% confident that true proportion of baseball player suffered from injury while playing is lie between 5.44% and 7.59%.

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