Refer to Exercise 7.1 where a construction engineer recorded the quantity of gravel (in metric tons) used

Question:

Refer to Exercise 7.1 where a construction engineer recorded the quantity of gravel (in metric tons) used in concrete mixes. The quantity of gravel for \(n=24\) sites has \(\bar{x}=5,818\) tons and \(s^{2}=7,273,809\) so \(s=\) 2,697 tons.

(a) Construct a test of hypotheses with the intent of showing that the mean gravel usage in the concrete mix is less than 5,800 tons. Take \(\alpha=0.10\).

(b) Based on your conclusion in part (a), what error could you have made? Explain in context of the problem.

Data From Exercise 7.1

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Related Book For  book-img-for-question

Probability And Statistics For Engineers

ISBN: 9780134435688

9th Global Edition

Authors: Richard Johnson, Irwin Miller, John Freund

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