In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of

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In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead.

a. Construct a 90% confidence interval for the proportion of water specimens that contain detectable levels of lead.

b. Construct a 95% confidence interval for the proportion of water specimens that contain detectable levels of lead.

c. What is the effect of increasing the level of confidence on the width of the interval?

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Elementary Statistics

ISBN: 9781259969454

3rd Edition

Authors: William Navidi, Barry Monk

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Question Posted: May 07, 2024 12:02 PM

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In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of

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Elementary Statistics

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