In a study, 10 healthy men were exposed to diesel exhaust for 1 hour. A measure of brain activity (called median power frequency, or MPF in Hz) was recorded at two different locations in the brain both before and after the diesel exhaust exposure. The resulting data are given in the accompanying table. For purposes of this exercise, assume that the sample of 10 men is representative of healthy adult males. Subject MPF (in Hz) Location 1 before Location 1 after Location 2 before Location 2 after 1 6.4 8.0 6.9 9.4 2 8.6 12.7 9.5 11.2 3 7.4 8.4 6.6 10.2 4 8.6 9.0 9.0 9.7 5 9.8 8.4 9.6 9.2 6 8.9 11.0 9.0 11.9 7 9.1 14.4 7.9 9.3 8 7.4 11.1 8.1 9.1 9 6.7 7.3 7.2 8.0 10 8.9 11.2 7.4 9.3 Construct a 90% confidence interval estimate for the difference in mean MPF at brain location 1 (in Hz) before and after exposure to diesel exhaust. (Hint: See Example 13.7.) (Use ?d = ?before − ?after. Use a table or technology. Round your answers to two decimal places.) , Hz Interpret the interval. There is a 90% chance that the difference in mean MPF at brain location 1 before and after exposure to diesel exhaust falls within this interval.There is a 90% chance that the difference in mean MPF at brain location 1 before and after exposure to diesel exhaust falls directly in the middle of this interval. There is a 90% chance that the true difference in mean MPF at brain location 1 before and after exposure to diesel exhaust falls directly in the middle of this interval.We are 90% confident that the difference in mean MPF at brain location 1 for the men in this study before and after exposure to diesel exhaust falls within this interval.We are 90% confident that the true difference in mean MPF at brain location 1 before and after exposure to diesel exhaust falls within this interval.

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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In a study, 10 healthy men were exposed to diesel exhaust for 1 hour. A measure of brain activity (called median power frequency, or MPF in Hz) was recorded at two different locations in the brain both before and after the diesel exhaust exposure. The resulting data are given in the accompanying table. For purposes of this exercise, assume that the sample of 10 men is representative of healthy adult males.

Subject	MPF (in Hz)
Location 1 before	Location 1 after	Location 2 before	Location 2 after
1	6.4	8.0	6.9	9.4
2	8.6	12.7	9.5	11.2
3	7.4	8.4	6.6	10.2
4	8.6	9.0	9.0	9.7
5	9.8	8.4	9.6	9.2
6	8.9	11.0	9.0	11.9
7	9.1	14.4	7.9	9.3
8	7.4	11.1	8.1	9.1
9	6.7	7.3	7.2	8.0
10	8.9	11.2	7.4	9.3

Construct a 90% confidence interval estimate for the difference in mean MPF at brain location 1 (in Hz) before and after exposure to diesel exhaust. (Hint: See Example 13.7.) (Use

?_d = ?_before − ?_after.

Use a table or technology. Round your answers to two decimal places.)

Interpret the interval.

There is a 90% chance that the difference in mean MPF at brain location 1 before and after exposure to diesel exhaust falls within this interval.There is a 90% chance that the difference in mean MPF at brain location 1 before and after exposure to diesel exhaust falls directly in the middle of this interval. There is a 90% chance that the true difference in mean MPF at brain location 1 before and after exposure to diesel exhaust falls directly in the middle of this interval.We are 90% confident that the difference in mean MPF at brain location 1 for the men in this study before and after exposure to diesel exhaust falls within this interval.We are 90% confident that the true difference in mean MPF at brain location 1 before and after exposure to diesel exhaust falls within this interval.

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