Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many grade-point averages must be obtained so that the sample mean is within 0.014 of the population mean? Assume that a 98% confidence level is desired. If using the range rule of thumh, a can be estimated ar range 6-0 = 1,5. Does the sample size seem practical? 4. The required sample size is. (Round up to the nearest whole number as needed.)

Assume that population means are to be estimated from the samples described. Use the sample results to approximate the margin of error and​ 95% confidence interval.   Sample size=64​, sample mean=69​, sample standard deviation=7 what is the margin of error

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?

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.