Homework Help is Here – Start Your Trial Now!
Math
Statistics
(b) Perform a z-test and find the p-value. Here is some information to help you with your Z-test. • The value of the test statistic is given by - • The p-value is two times the area under the curve to the left of the value of the test statistic. Step 2: Enter the test statistic. (Round to 3 decimal places.) 0.3 Step 3: Shade the area represented by the p- value. 0.2 0.H Step 4: Enter the p- value. (Round to 3 decimal places.) (c) Based on your answer to part (b), choose what can be concluded, at the 0.05 level of significance, about the claim made by the management. Since the p-value is less than (or equal to) the level of significance, the null hypothesis is rejected. Šo, there is enough evidence to support the claim that the mean customer rating is not equal to 80. ? Since the p-value is less than (or equal to) the level of significance, the null hypothesis is not rejected. So, there is not enough evidence to support the claim that the mean customer rating is not equal to 80. Since the p-value is greater than the level of significance, the null hypothesis is rejected. So, there is enough evidence to support the claim that the mean customer rating is not equal to 80. Since the p-value is greater than the level of significance, the null hypothesis is not rejected. Šo, there is not enough evidence to support the claim that the mean customer rating is not equal to 80.

(b) Perform a z-test and find the p-value. Here is some information to help you with your Z-test. • The value of the test statistic is given by - • The p-value is two times the area under the curve to the left of the value of the test statistic. Step 2: Enter the test statistic. (Round to 3 decimal places.) 0.3 Step 3: Shade the area represented by the p- value. 0.2 0.H Step 4: Enter the p- value. (Round to 3 decimal places.) (c) Based on your answer to part (b), choose what can be concluded, at the 0.05 level of significance, about the claim made by the management. Since the p-value is less than (or equal to) the level of significance, the null hypothesis is rejected. Šo, there is enough evidence to support the claim that the mean customer rating is not equal to 80. ? Since the p-value is less than (or equal to) the level of significance, the null hypothesis is not rejected. So, there is not enough evidence to support the claim that the mean customer rating is not equal to 80. Since the p-value is greater than the level of significance, the null hypothesis is rejected. So, there is enough evidence to support the claim that the mean customer rating is not equal to 80. Since the p-value is greater than the level of significance, the null hypothesis is not rejected. Šo, there is not enough evidence to support the claim that the mean customer rating is not equal to 80.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
(b) Perform a Z-test and find the p-value. Here is some information to help you with your Z-test. x -u The value of the test statistic is given by The p-value is two times the area under the curve to the left of the value of the test statistic. Step 2: Enter the test statistic. (Round to 3 decimal places.) 0.3 Step 3: Shade the area represented by the p- value. 0.2 0.H Step 4: Enter the p- value. (Round to 3 decimal places.) (c) Based on your answer to part (b), choose what can be concluded, at the 0.05 level of significance, about the claim made by the management. o Since the p-value is less than (or equal to) the level of significance, the null hypothesis is rejected. So, there is enough evidence to support the claim that the mean customer rating is not equal to 80. ? Since the p-value is less than (or equal to) the level of significance, the null hypothesis is not rejected. So, there is not enough evidence to support the claim that the mean customer rating is not equal to 80. o Since the p-value is greater than the level of significance, the null hypothesis is rejected. So, there is enough evidence to support the claim that the mean customer rating is not equal to 80. o Since the p-value is greater than the level of significance, the null hypothesis is not rejected. So, there is not enough evidence to support the claim that the mean customer rating is not equal to 80.
Transcribed Image Text:(b) Perform a Z-test and find the p-value. Here is some information to help you with your Z-test. x -u The value of the test statistic is given by The p-value is two times the area under the curve to the left of the value of the test statistic. Step 2: Enter the test statistic. (Round to 3 decimal places.) 0.3 Step 3: Shade the area represented by the p- value. 0.2 0.H Step 4: Enter the p- value. (Round to 3 decimal places.) (c) Based on your answer to part (b), choose what can be concluded, at the 0.05 level of significance, about the claim made by the management. o Since the p-value is less than (or equal to) the level of significance, the null hypothesis is rejected. So, there is enough evidence to support the claim that the mean customer rating is not equal to 80. ? Since the p-value is less than (or equal to) the level of significance, the null hypothesis is not rejected. So, there is not enough evidence to support the claim that the mean customer rating is not equal to 80. o Since the p-value is greater than the level of significance, the null hypothesis is rejected. So, there is enough evidence to support the claim that the mean customer rating is not equal to 80. o Since the p-value is greater than the level of significance, the null hypothesis is not rejected. So, there is not enough evidence to support the claim that the mean customer rating is not equal to 80.
Over the years, the mean customer satisfaction rating at a local restaurant has been 80. The restaurant was recently remodeled, and now the management claims the mean customer rating, u, is not equal to 80. In a sample of 54 customers chosen at random, the mean customer rating is 73.6 . Assume that the population standard deviation of customer ratings is 21.1. Is there enough evidence to support the claim that the mean customer rating is different from 80? Perform a hypothesis test, using the 0.05 level of significance. (a) State the null hypothesis H, and the alternative hypothesis H,. Ho: 0 H:0 OSO D=0 (b) Perform a Z-test and find the p-value. Here is some information to help you with your Z-test. x- u • The value of the test statistic is given by • The p-value is two times the area under the curve to the left of the value of the test statistic. Standard Normal Distribution Step 1: Select one-tailed or two-tailed. 0.3 O One-tailed O Two-tailed Step 2: Enter the test statistic. 0.2 (Round to 3 decimal places.) 0.H Step 3: Shade the area represented by the p- value.
Transcribed Image Text:Over the years, the mean customer satisfaction rating at a local restaurant has been 80. The restaurant was recently remodeled, and now the management claims the mean customer rating, u, is not equal to 80. In a sample of 54 customers chosen at random, the mean customer rating is 73.6 . Assume that the population standard deviation of customer ratings is 21.1. Is there enough evidence to support the claim that the mean customer rating is different from 80? Perform a hypothesis test, using the 0.05 level of significance. (a) State the null hypothesis H, and the alternative hypothesis H,. Ho: 0 H:0 OSO D=0 (b) Perform a Z-test and find the p-value. Here is some information to help you with your Z-test. x- u • The value of the test statistic is given by • The p-value is two times the area under the curve to the left of the value of the test statistic. Standard Normal Distribution Step 1: Select one-tailed or two-tailed. 0.3 O One-tailed O Two-tailed Step 2: Enter the test statistic. 0.2 (Round to 3 decimal places.) 0.H Step 3: Shade the area represented by the p- value.
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
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
SEE MORE TEXTBOOKS