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5.4 An additional 2000 runners entered the race but did not complete it. Of these runners, a mail questionnaire was sent to a random sample of 600 and com- pleted by 500. One of the items in this questionnaire asked the respondent to estimate the average number of miles run weekly during the 8 weeks preced- ing the marathon. The mean of the number of miles run was 32.4 with standard deviation s, equal to 7.3. A simple random sample of 500 of the 10,000 runners completing the marathon yielded 400 respondents who aver- aged 46.8 miłes weekly with standard deviation equal to 6.2 miles. What is the estimated weekly miles run in that period among all those who entered the marathon?

5.4 An additional 2000 runners entered the race but did not complete it. Of these runners, a mail questionnaire was sent to a random sample of 600 and com- pleted by 500. One of the items in this questionnaire asked the respondent to estimate the average number of miles run weekly during the 8 weeks preced- ing the marathon. The mean of the number of miles run was 32.4 with standard deviation s, equal to 7.3. A simple random sample of 500 of the 10,000 runners completing the marathon yielded 400 respondents who aver- aged 46.8 miłes weekly with standard deviation equal to 6.2 miles. What is the estimated weekly miles run in that period among all those who entered the marathon?

MATLAB: An Introduction with Applications
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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5.4 An additional 2000 runners entered the race but did not complete it. Of these runners, a mail questionnaire was sent to a random sample of 600 and com- pleted by 500. One of the items in this questionnaire asked the respondent to estimate the average number of miles run weekly during the 8 weeks preced- ing the marathon. The mean of the number of miles run was 32.4 with equal to 7.3. A simple random sample of 500 of the standard deviation 10,000 runners completing the marathon yielded 400 respondents who aver- aged 46.8 mites weekly with standard deviation equal to 6.2 miles, What is the estimated weekly miles run in that period among all those who entered the marathon?
Transcribed Image Text:5.4 An additional 2000 runners entered the race but did not complete it. Of these runners, a mail questionnaire was sent to a random sample of 600 and com- pleted by 500. One of the items in this questionnaire asked the respondent to estimate the average number of miles run weekly during the 8 weeks preced- ing the marathon. The mean of the number of miles run was 32.4 with equal to 7.3. A simple random sample of 500 of the standard deviation 10,000 runners completing the marathon yielded 400 respondents who aver- aged 46.8 mites weekly with standard deviation equal to 6.2 miles, What is the estimated weekly miles run in that period among all those who entered the marathon?
5.1 From a simple random serolłogical sample of 1000 runners selected from 10,000 who completed the 2007 Chicago Marathon, 35 were found to be posi- tive for steroids and other performance-enhancing drugs. When categorized by completion time, the results were as follows: Completion Time (h) No. in No. Positive Percentage for Drugs Sample 100 Positive Under 2.5 25 25.00 2.5-4.0 500 7 1.40 Over 4.0 400 3 0.75 Total 1000 35 3.50
Transcribed Image Text:5.1 From a simple random serolłogical sample of 1000 runners selected from 10,000 who completed the 2007 Chicago Marathon, 35 were found to be posi- tive for steroids and other performance-enhancing drugs. When categorized by completion time, the results were as follows: Completion Time (h) No. in No. Positive Percentage for Drugs Sample 100 Positive Under 2.5 25 25.00 2.5-4.0 500 7 1.40 Over 4.0 400 3 0.75 Total 1000 35 3.50
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