Answered: In an automobile repair and service…

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 an automobile repair and service industry, the average number of defective items in all the lots of automobile parts produced by a machine last week was 8. The supervisor believes that the mean number of defective parts produced by the same machine will differ in the present week. To test whether the average differs from 8, he samples 30 lots to obtain the mean number of defective parts to be 9 with a standard deviation of 3.

Using the critical value approach, identify the decision at the 5% level of significance.

Group of answer choices

The decision is not to reject H₀ because the test statistic does not fall in the rejection region (-∞,-1.960] U [1.960, ∞).

The decision is to reject H₀ because the test statistic falls in the rejection region (-∞,-1.645].

The decision is not to reject H₀ because the test statistic does not fall in the rejection region [1.645, ∞).

The decision is not to reject H₀ because the test statistic does not fall in the rejection region (-∞,-1.645] U [1.645, ∞).

The decision is to reject H₀ because the t

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