Question: A simple random sample of 60 items resulted in a

A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is σ = 15.
a. Compute the 95% confidence interval for the population mean.
b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean.
c. What is the effect of a larger sample size on the interval estimate?


View Solution:


Sale on SolutionInn
Sales2
Views144
Comments
  • CreatedFebruary 16, 2015
  • Files Included
Post your question
5000