# Question

For a data set obtained from a sample, n = 20 and . It is known that σ = 3.1. The population is normally distributed.

a. What is the point estimate of µ?

b. Make a 99% confidence interval for µ.

c. What is the margin of error of estimate for part b?

a. What is the point estimate of µ?

b. Make a 99% confidence interval for µ.

c. What is the margin of error of estimate for part b?

## Answer to relevant Questions

An insurance company selected a sample of 50 auto claims filed with it and investigated those claims carefully. The company found that 12% of those claims were fraudulent. a. What is the point estimate of the percentage of ...An economist wants to find a 90% confidence interval for the mean sale price of houses in a state. How large a sample should she select so that the estimate is within $3500 of the population mean? Assume that the standard ...When one is attempting to determine the required sample size for estimating a population mean, and the information on the population standard deviation is not available, it may be feasible to take a small preliminary sample ...The standard deviation for a population is σ = 14.8. A sample of 25 observations selected from this population gave a mean equal to 143.72. The population is known to have a normal distribution. a. Make a 99% confidence ...Determine the sample size for the estimate of for the following. a. E = .17, σ = .90, confidence level = 99% b. E = 1.45, σ = 5.82, confidence level = 95% c. E = 5.65, σ = 18.20, confidence level = 90%Post your question

0