Answered: In a study of the accuracy of fast…

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

In a study of the accuracy of fast food drive-through orders, one restaurant had 34 orders that were not accurate among 351 orders observed. Use a 0.05 significance level to test the claim that the rate of inaccurate orders is equal to 10%. Does the accuracy rate appear to beacceptable?

a. Identify the null and alternative hypotheses for this test

b.Identify the test statistic for this hypothesis test.

The test statistic for this hypothesis test is (Round to two decimal places as needed.)

c. Identify the P-value for this hypothesis test.

The P-value for this hypothesis test is

(Round to three decimal places as needed.)

d. Identify the conclusion for this hypothesis test.

A.Fail to reject Upper H 0. There is not sufficient evidence to warrant rejection of the claim that the rate of inaccurate orders is equal to 10%.

B. Fail to reject Upper H 0.There is sufficient evidence to warrant rejection of the claim that the rate of inaccurate orders is equal to 10%.

C. Reject Upper H 0. There is sufficient evidence to warrant rejection of the claim that the rate of inaccurate orders is equal to 10%.

D. Reject Upper H 0. There is not sufficient evidence to warrant rejection of the claim that the rate of inaccurate orders is equal to 10%.

e. Does the accuracy rate appear to be acceptable?

A.Since thereis not sufficient evidence to reject the claim that the rate of inaccurate orders is equal to 10%, the restaurant should work to increase that rate.

B.Since there is sufficient evidence to reject the claim that the rate of inaccurate orders is equal to 10%, the inaccuracy rate is acceptable.

C.Since there is sufficient evidence to reject the claim that the rate of inaccurate orders is equal to 10%, the inaccuracy rate is unacceptable, so the restaurant should work to lower that rate.

D.Since there is not sufficient evidence to reject the claim that the rate of inaccurate orders is equal to 10%, it is plausible that the inaccuracy rate

is 10%. This rate would be too high ,so the restaurant should work to lower the rate.

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