The mean amount purchased by each customer at Churchill's Grocery Store is $32, with a standard deviation of $9. The population is positively skewed. For a sample of 41 customers, answer the following questions: a. What is the likelihood the sample mean is at least $33? (Round the z value to 2 decimal places and the final answer to 4 decimal places.) Probability b. What is the likelihood the sample mean is greater than $30 but less than $33? (Round the z value to 2 decimal places and the final answer to 4 decimal places.) Probability c. Within what limits will 95% of the sample means occur? (Round the final answers to 2 decimal places.) Sample means limits and $[

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

11.

 

The mean amount purchased by each customer at Churchill's Grocery Store is $32, with a standard deviation of $9. The population is
positively skewed. For a sample of 41 customers, answer the following questions:
a. What is the likelihood the sample mean is at least $33? (Round the z value to 2 decimal places and the final answer to 4 decimal
places.)
Probability
b. What is the likelihood the sample mean is greater than $30 but less than $33? (Round the z value to 2 decimal places and the final
answer to 4 decimal places.)
Probability
c. Within what limits will 95% of the sample means occur? (Round the final answers to 2 decimal places.)
Sample means limits
and $
Transcribed Image Text:The mean amount purchased by each customer at Churchill's Grocery Store is $32, with a standard deviation of $9. The population is positively skewed. For a sample of 41 customers, answer the following questions: a. What is the likelihood the sample mean is at least $33? (Round the z value to 2 decimal places and the final answer to 4 decimal places.) Probability b. What is the likelihood the sample mean is greater than $30 but less than $33? (Round the z value to 2 decimal places and the final answer to 4 decimal places.) Probability c. Within what limits will 95% of the sample means occur? (Round the final answers to 2 decimal places.) Sample means limits and $
Expert Solution
steps

Step by step

Solved in 4 steps with 3 images

Blurred answer
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