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  3. the home run percentage is the number of home runs

The home run percentage is the number of home runs per 100 times at bat. A...

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Statistics

The home run percentage is the number of home runs per 100 timesat bat. A random sample of 43 professional baseball players gavethe following data for home run percentages.

1.62.41.26.62.30.01.82.56.51.8
2.72.01.91.32.71.71.32.12.81.4
3.82.13.41.31.52.92.60.04.12.9
1.92.40.01.83.13.83.21.64.20.0
1.21.82.4

(a) Use a calculator with mean and standard deviation keys tofind x and s. (Round your answers to two decimalplaces.)

x =%
s =%


(b) Compute a 90% confidence interval for the population mean? of home run percentages for all professional baseballplayers. Hint: If you use the Student's tdistribution table, be sure to use the closest d.f. thatis smaller. (Round your answers to two decimalplaces.)

lower limit    %
upper limit    %


(c) Compute a 99% confidence interval for the population mean? of home run percentages for all professional baseballplayers. (Round your answers to two decimal places.)

lower limit    %
upper limit    %

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