A consumer affairs investigator records the repair cost for 23 randomly selected refrigerators. A sample mean of $88.05 and standard deviation of $10.52 are subsequently computed. Determine the 80% confidence interval for the mean repair cost for the refrigerators. Assume the population is approximately normal.
Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
Already registered? Login
Not Account? Sign up
Enter your email address to reset your password
Back to Login? Click here