Answered: he U.S. Department of Health monitors…

Name: The U.S. Department of Health monitors fishing waters, to determine if
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Description: The U.S. Department of Health monitors fishing waters, to determine if the bacteria count has risen above a maximum safe level of 70. The following observations were obtained from 9 random samples of a stream: 69, 74, 75, 70, 72, 73, 71, 73, and 68.

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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The U.S. Department of Health monitors fishing waters, to determine if the bacteria count has risen above a maximum safe level of 70. The following observations were obtained from 9 random samples of a stream: 69, 74, 75, 70, 72, 73, 71, 73, and 68. Can you say that the bacteria are above the safe level (alpha=0.05)?

Calculate the appropriate test statistic.
What is the critical value for the test?
Would you issue a warning about the bacteria levels in the stream? Why?

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