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In: Statistics and Probability

A sample of 90 WCC students found that 57 of them were female. a)Find a point...

  1. A sample of 90 WCC students found that 57 of them were female. a)Find a point estimate for the percentage of all WCC students that are female. b)Find the 95% margin of error for the estimate. c)Make a 95% confidence interval for the percentage of all WCC students that are female. Interpret the interval.

2. A sample of 84 WCC students found mean age 24.7 years old with standard deviation 7.9 years old.

a) Make an 80% confidence interval for the mean age of all WCC students. Interpret the interval.

b) Redo (a) if instead of 84 students, only 17 students had been sampled. Do not interpret the interval.

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orchestra answered 2 years ago
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