n = n = n = n = n = n = 1.6450 M n = 1.960 M 2.330 M 2.580 M 2.6760 M 1.960 M 2 What would be the appropriate formula for determining sample size when the desired confidence level 1.6450 M 2.330 M 2 2 2 2 2 2 2 2 2.580 M (2.6760)² M

Determine the minimum sample size required when you want to be 95% confident that the sample mean is within one unit of the population mean and o= 16.2. Assume the population is normally distributed. A 95% confidence level requires a sample size of (Round up to the nearest whole number as needed.)

A sample of 80 University night school students' ages was obtained in order to estimate the mean age of all night school students. The sample mean was 25.1 years, with a sample variance of 16.2.     a. Give the point estimate for µ, the population mean, along with the margin of error.     b. Calculate the 99% confidence interval for µ.

Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 234 with 29.1% successes at a confidence level of 95%.