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11. A football coach claims that the average weight of all the opposing teams' members is 225 pounds. For a test of the claim, a sample of 50 players is taken from all the opposing teams. The mean is found to be 230 pounds and a standard deviation 15 pounds. At a = 0.01, test the coach's claim. Find the P-value, and make the decision. Construct a corresponding confidence interval for the population parameter.

11. A football coach claims that the average weight of all the opposing teams' members is 225 pounds. For a test of the claim, a sample of 50 players is taken from all the opposing teams. The mean is found to be 230 pounds and a standard deviation 15 pounds. At a = 0.01, test the coach's claim. Find the P-value, and make the decision. Construct a corresponding confidence interval for the population parameter.

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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11. A football coach claims that the average weight of all the opposing teams' members is 225 pounds. For a test of the claim, a sample of 50 players is taken from all the opposing teams. The mean is found to be 230 pounds and a standard deviation 15 pounds. At a = 0.01, test the coach's claim. Find the P-value, and make the decision. Construct a corresponding confidence interval for the population parameter.
Transcribed Image Text:11. A football coach claims that the average weight of all the opposing teams' members is 225 pounds. For a test of the claim, a sample of 50 players is taken from all the opposing teams. The mean is found to be 230 pounds and a standard deviation 15 pounds. At a = 0.01, test the coach's claim. Find the P-value, and make the decision. Construct a corresponding confidence interval for the population parameter.
4. An airline claims that the average number of years of experience of its pilots is at least 18.3. In a study of 20 pilots, the average number of years of experience was 17.4. The standard deviation of the sample was 3. At a = 0.10, is the number of years of experience of the pilots really what the airline claimed? Assume that the variable is approximately normally distributed. Construct a corresponding confidence interval for the population parameter. (0, * ++19,690 S/√π) A recent study
Transcribed Image Text:4. An airline claims that the average number of years of experience of its pilots is at least 18.3. In a study of 20 pilots, the average number of years of experience was 17.4. The standard deviation of the sample was 3. At a = 0.10, is the number of years of experience of the pilots really what the airline claimed? Assume that the variable is approximately normally distributed. Construct a corresponding confidence interval for the population parameter. (0, * ++19,690 S/√π) A recent study
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