Assume that a sample is used to estimate a population mean μμ. Find the 80% confidence interval for a sample of size 55 with a mean of 85.5 and a standard deviation of 21.5. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places.a. 80% C.I. = The answer should be obtained without any preliminary rounding

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=21.4. You would like to be 98% confident that your estimate is within 5 of the true population mean. How large of a sample size is required?

A statistics class is estimating the mean height of all female students at their college. They collect a random sample of 42 female students and measure their heights. The mean of the sample is 65.3 inches and the sample standard deviation is 5.4 inches. Find the 90% confidence interval for the mean height of all female students in their school? Assume that the distribution of individual female heights at this school is approximately normal. 1. The t value is 1.3025 2. The standard error has a value of -- 3. The margin of error has a value of 4. Find the 90% confidence interval for the mean height of all female students in their school

Assume that a sample is used to estimate a population mean μμ. Find the 99% confidence interval for a sample of size 26 with a mean of 44.8 and a standard deviation of 17.4. Enter your answer accurate to one decimal place.I am 99% confident that the mean μμ is between  and

Assuming that a sample is used to estimate a population mean μμ. Find the margin of error M.E. that corresponds to a sample size 7 with a mean of 39.8 and a standard deviation of 21.9 at a confidence level of 90%.Report ME accurate to one decimal place because the sample statistics are presented with this accuracy.M.E. =

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=51.3. You would like to be 98% confident that your estimate is within 10 of the true population mean. How large of a sample size is required?

The random sample of n=75�=75 yielded a sample mean of x¯=26�¯=26.Assume that we know the population standard deviation is σ=30�=30.    Step 2 of 3 :   Calculate a 95% confidence interval for the population mean. Round your answers to 2 decimals places.

Assume that a sample is used to estimate a population mean μμ. Find the margin of error that corresponds to a sample of size 16 with a mean of 68.3 and a standard deviation of 17.9 at a confidence level of 99%.Report the margin of error accurate to one decimal place because the sample statistics are presented with this accuracy.E=