Do the data in Exercise 9.22 substantiate the conjecture that the true standard deviation of the acidity

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Do the data in Exercise 9.22 substantiate the conjecture that the true standard deviation of the acidity measurements is larger than 0.4? Test at a = .05.

Data from in Exercise 9.22

Measurements of the acidity (pH) of rain samples were recorded at 13 sites in an industrial region.

Determine a 95% confidence interval for the mean acidity of rain in that region.

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Statistics Principles And Methods

ISBN: 9781119497110

8th Edition

Authors: Richard A. Johnson, Gouri K. Bhattacharyya

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Question Posted: Nov 01, 2022 09:51 AM

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Do the data in Exercise 9.22 substantiate the conjecture that the true standard deviation of the acidity

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3.5 5.1 5.0 3.6 4.3 4.2 4.5 4.8 4.9 4.7 3.6 4.8 4.7

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Assume that the population distribution is normal Because ...View the full answer

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