Given a normal distribution of scores calculate 95% confidence interval for the standard deviation? Given: Sample...

Given a normal distribution of scores calculate 95% confidence interval for the standard deviation? Given: Sample mean = 87.1667. Sample size is 12. Sample variance = 60.88.

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Calculate the two-sided 95% confidence interval for the population standard deviation (sigma) given that a sample...

Calculate the two-sided 95% confidence interval for the population standard deviation (sigma) given that a sample of size n=8 yields a sample standard deviation of 7.96.

Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the...

Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a random sample of 17 patients at a hospital's minor emergency department, the mean waiting time before seeing a medical professional was 14 minutes and the standard deviation was 9 minutes. Assume the waiting times are not normally distributed. Which distribution should be used to construct the...

Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the...

Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a random sample of 47 people, the mean body mass index (BMI) was 27.7 and the standard deviation was 6.02. Which distribution should be used to construct the confidence interval? Choose the correct answer below:

Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the...

Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a random sample of 18 mortgage institutions, the mean interest rate was 3.49% and the standard deviation was 0.48%. Assume the interest rates are normally distributed. Which distribution should be used to construct the confidence interval? A. Use a normal distribution because nless than30 and the interest...

Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the...

Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a random sample of 12 mortgage institutions, the mean interest rate was 3.48% and the standard deviation was 0.32%. Assume the interest rates are normally distributed. Which distribution should be used to construct the confidence interval? A.Use a t-distribution because the interest rates are normally distributed and...

Construct a 95% confidence interval for the population standard deviation of a random sample of 15...

Construct a 95% confidence interval for the population standard deviation of a random sample of 15 crates which have a mean weight of 165.2 points and a standard deviation of 12.9 pounds. Assume the population is normallyn distributed. A. 9.9, 18.8 B. 9.4, 20.3 Please show work.

one can calculate the 95% confidence interval for the mean with the population standard deviation knowing...

one can calculate the 95% confidence interval for the mean with the population standard deviation knowing this gives us an upper and lower confidence limit what happens if we decide to calculate the 99% confidence interval describe how the increase in the confidence level has changed the width of the confidence interval

One can calculate the 95% confidence interval for the mean with the population standard deviation known....

One can calculate the 95% confidence interval for the mean with the population standard deviation known. This will give us an upper and a lower confidence limit. What happens if we decide to calculate the 99% confidence interval? Describe how the increase in the confidence level has changed the width of the confidence interval. Do the same for the confidence interval set at 80%. Include an example with actual numerical values for the intervals in your post to help with...

One can calculate the 95% confidence interval for the mean with the population standard deviation known....

One can calculate the 95% confidence interval for the mean with the population standard deviation known. This will give us an upper and a lower confidence limit. What happens if we decide to calculate the 99% confidence interval? Your task for this discussion is as follows: Describe how the increase in the confidence level has changed the width of the confidence interval. Do the same for the confidence interval set at 80%. Include an example with actual numerical values for...

Determine the 95% confidence interval estimate for the population mean of a normal distribution given n=144,...

Determine the 95% confidence interval estimate for the population mean of a normal distribution given n=144, sigma=105, and x overbar=1,200. The 95% confidence interval for the population mean is from to . (Round to two decimal places as needed. Use ascending order.

Subjects