Answered: A large supermarket carries four…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

A large supermarket carries four qualities of ground beef. Customers are believed to purchase these four varieties with probabilities of 0.11, 0.29, 0.14, and 0.46, respectively, from the least to most expensive variety. A sample of 520 purchases resulted in sales of 42, 143, 73, and 262 of the respective qualities. Does this sample contradict the expected proportions? Use ? = 0.05.

(a) Find the test statistic. (Round your answer to two decimal places.)

(ii) Find the p-value. (Round your answer to four decimal places.)

(b) State the appropriate conclusion.

Fail to reject the null hypothesis. There is not significant evidence of a difference from the expected proportions.Reject the null hypothesis. There is not significant evidence of a difference from the expected proportions. Reject the null hypothesis. There is significant evidence of a difference from the expected proportions.Fail to reject the null hypothesis. There is significant evidence of a difference from the expected proportions.

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