The mean preparation fee H&R Block charged retail customers last year was $183(the Wall Street Journal, March 7, 2012). Use this price as the population mean andassume the population standard deviation of preparation fees is $50.a. What is the probability that the mean price for a sample of 30 H&R Block retailcustomers is within $8 of the population mean?b. What is the probability that the mean price for a sample of 50 H&R Block retailcustomers is within $8 of the population mean?c. What is the probability that the mean price for a sample of 100 H&R Block retailcustomers is within $8 of the population mean?d. Which, if any, of the sample sizes in parts (a), (b), and (c) would you recommend tohave at least a .95 probability that the sample mean is within $8 of the population mean?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

The mean preparation fee H&R Block charged retail customers last year was $183
(the Wall Street Journal, March 7, 2012). Use this price as the population mean and
assume the population standard deviation of preparation fees is $50.
a. What is the probability that the mean price for a sample of 30 H&R Block retail
customers is within $8 of the population mean?
b. What is the probability that the mean price for a sample of 50 H&R Block retail
customers is within $8 of the population mean?
c. What is the probability that the mean price for a sample of 100 H&R Block retail
customers is within $8 of the population mean?
d. Which, if any, of the sample sizes in parts (a), (b), and (c) would you recommend to
have at least a .95 probability that the sample mean is within $8 of the population mean?

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps with 3 images

Blurred answer
Knowledge Booster
Point Estimation, Limit Theorems, Approximations, and Bounds
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman