A random sample of 225 exams score drawn from a large population of students has a mean of 60 and a sample standard deviation of 9.
Estimate the population mean with a confidence level of 95%. _______< <________
Estimate the population mean with a confidence level of 98%. _______ < <________
Your final answers should be correct to 4 places after the decimal point.
For a confidence level of 95% assuming the same statistics find the sample size that would result in a margin of error of 1.5. ______________
For a sample size of 225 find the level of confidence that would result in a margin of error of 1.5. ________________
Your final answers should be correct to 3 places after the decimal point.
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