Question 8.141

44. Teachers' Salaries. The Digest of Educational Statistics reported that the mean salary for teachers in 2012 was $56,410. Assume that the sample size was 101 and the sample standard deviation was $15,000.

  1. State how the conditions for the interval for are met.
  2. Find for a confidence interval with 90% confidence.
  3. Construct and interpret a 90% confidence interval for the population mean teacher salary.