Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many grade-point averages must be obtained so that the sample mean is within 0.005 of the population mean? Assume that a 95% confidence level is desired If using the range rule of thumb, a can be estimated as - range 4-0 1. Does the sample size seem practical?

A state meat inspector in Iowa has been given the assignment of estimating the mean net weight of packages of ground chuck labeled “3 pounds.” Of course, he realized that the weights cannot always be precisely 3 pounds. A sample of 36 packages reveals the mean weight to be 3.01 pounds, with a standard deviation of 0.03 pound. What is the estimated population mean? Determine a 95% confidence interval for the population mean.

What is the minimum required sample size to make a 96% confidence interval for a population mean if the margin of error is to be 2 inches and the standard deviation is thought to be about 12 inches?

A sample size must be determined for estimating a population mean given that the confidence level is 99​% and the desired margin of error is 0.24. The largest value in the population18 is thought to be and the smallest value is thought to be 6 .

The following sample data are from a normal population: 10,9,12,14,13,11,6,5 c. With 95% confidence, what is the margin of error for the estimation of the population mean (to 1 decimal)?  d. What is the 95% confidence interval for the population mean (to  1 decimal)?   d.

Determine the sample size needed to estimate a population with a mean of 10 units given that the population standard deviation is 50; use a confidence level of 90%.

You want to estimate the mean weight of quarters in circulation. A sample of 60 quarters has a mean weight of 5.682 grams and a standard deviation of 0.061 gram. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. The estimate for the mean weight of all quarters is (Round to three decimal places as needed.) grams. Find the 95% confidence interval for the mean weight of all quarters. grams < p< grams (Round to three decimal places as needed.)

Identify the t-score for a 95% confidence interval if the sample size is 15. t =  the answer isnt 2.131 so what is the answer?

A 95% confidence interval for the population mean is 18 < mu < 24. What is the sample mean?

If you want to construct a 90% confident interval for a population mean such that it is within a quarter (population) standard deviation from the sample mean, then what is the minimum sample size required?