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.
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.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Question
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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