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# Noise Levels in Hospitals The mean noise level of 20 areas

ISBN: 9780073386102 241

## Solution for problem 3 Chapter 9-2

Elementary Statistics: A Step by Step Approach 8th ed. | 8th Edition

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Problem 3

Noise Levels in Hospitals The mean noise level of 20 areas designated as casualty doors was 63.1 dBA, and the standard deviation is 4.1 dBA. The mean noise level for 24 areas designated as operating theaters was 56.3 dBA, and the standard deviation was 7.5 dBA. At a _ 0.05, can it be concluded that there is a difference in the means?

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STAT 2004 Week 2 Lecture 5 Fri. 01/27/17 Observational study: data analysis where researcher does not interfere with data outcomes Experiment: researcher directly interferes with data outcomes y imposing treatments and controls Observational  An example of an observational study would be a survey: did you get a flu shot  Observational studies help establish correlation Experiment...

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##### ISBN: 9780073386102

This full solution covers the following key subjects: . This expansive textbook survival guide covers 67 chapters, and 1718 solutions. This textbook survival guide was created for the textbook: Elementary Statistics: A Step by Step Approach 8th ed., edition: 8. Elementary Statistics: A Step by Step Approach 8th ed. was written by and is associated to the ISBN: 9780073386102. Since the solution to 3 from 9-2 chapter was answered, more than 237 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 3 from chapter: 9-2 was answered by , our top Statistics solution expert on 01/15/18, 03:26PM. The answer to “Noise Levels in Hospitals The mean noise level of 20 areas designated as casualty doors was 63.1 dBA, and the standard deviation is 4.1 dBA. The mean noise level for 24 areas designated as operating theaters was 56.3 dBA, and the standard deviation was 7.5 dBA. At a _ 0.05, can it be concluded that there is a difference in the means?” is broken down into a number of easy to follow steps, and 62 words.

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