b) if the sample mean is $15,000, what is the 98% confidence interval for the population mean?
c) discuss what happens to the width of the confidence interval as confidence level is increased. does this seem reasonable? explain.
d) if the data were collected for a sample of 25 rather than 500, develop a 95% confidence interval for the population mean (assuming the population has a normal probability distribution).
e) discuss what happens to the width of the confidence interval as the sample size decreases. does this seem reasonable? explain.© BrainMass Inc. brainmass.com June 3, 2020, 11:01 pm ad1c9bdddf
The solution provides step by step method for the calculation of confidence interval for mean . Formula for the calculation and Interpretations of the results are also included.