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# Assume that all variable are approximately | Ch 7.2 - 16E

ISBN: 9780073534985 75

## Solution for problem 16E Chapter 7.2

Elementary Statistics: A Step By Step Approach | 9th Edition

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Elementary Statistics: A Step By Step Approach | 9th Edition

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Problem 16E

Assume that all variable are approximately normally distributed.

Hospital Noise Levels For a sample of 24 operating rooms taken in the hospital study mentioned in Exercise 19 in Section 7–1, the mean noise level was 41.6 decibels, and the standard deviation was 7.5. Find the 95% confidence interval of the true mean of the noise levels in the operating rooms.

Source: M. Bayo.. A. Garcia, and A. Garcia. “Noise Levels in an Urban Hospital and Workers’ Subjective Responses.” Archives of Environmental Health 50. no. 3. p. 249 (May–June 1995). Reprinted with permission of the Helen Dwight Reid Educational Foundation. Published by Heldref Publications. 1319 Eighteenth St. N. W., Washington, D.C. 20036-1802. Copyright © 1995.

Step-by-Step Solution:

Step 1 of 2:

From the given problem, we have

The sample size n = 24

The mean

The standard deviation

The confidence interval = 95% = 0.95.

We have to find the 95% confidence interval of the true mean of the noise levels in the operating rooms.

Step 2 of 2

##### ISBN: 9780073534985

Elementary Statistics: A Step By Step Approach was written by and is associated to the ISBN: 9780073534985. Since the solution to 16E from 7.2 chapter was answered, more than 254 students have viewed the full step-by-step answer. This full solution covers the following key subjects: noise, levels, hospital, Operating, mean. This expansive textbook survival guide covers 33 chapters, and 1015 solutions. The full step-by-step solution to problem: 16E from chapter: 7.2 was answered by , our top Statistics solution expert on 09/01/17, 05:46AM. The answer to “Assume that all variable are approximately normally distributed.Hospital Noise Levels For a sample of 24 operating rooms taken in the hospital study mentioned in Exercise 19 in Section 7–1, the mean noise level was 41.6 decibels, and the standard deviation was 7.5. Find the 95% confidence interval of the true mean of the noise levels in the operating rooms.Source: M. Bayo.. A. Garcia, and A. Garcia. “Noise Levels in an Urban Hospital and Workers’ Subjective Responses.” Archives of Environmental Health 50. no. 3. p. 249 (May–June 1995). Reprinted with permission of the Helen Dwight Reid Educational Foundation. Published by Heldref Publications. 1319 Eighteenth St. N. W., Washington, D.C. 20036-1802. Copyright © 1995.” is broken down into a number of easy to follow steps, and 112 words. This textbook survival guide was created for the textbook: Elementary Statistics: A Step By Step Approach , edition: 9.

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