The average time to run the 5K fun run is 24 minutes and the standard deviation is 2.6 minutes. 8 runners are randomly selected to run the 5K fun run. Round all answers to 4 decimal places where...


The average time to run the 5K fun run is 24 minutes and the standard deviation is 2.6 minutes. 8 runners<br>are randomly selected to run the 5K fun run. Round all answers to 4 decimal places where possible and<br>assume a normal distribution.<br>a. What is the distribution of X? X - N( 24<br>2.6<br>b. What is the distribution of ? - N( 24<br>0.9192 v<br>c. What is the distribution of ) x? )<br>x - N( 192<br>7.3539 v) o<br>d. If one randomly selected runner is timed, find the probability that this runner's time will be between<br>23.7212 and 24.9212 minutes. 0.1811<br>e. For the 8 runners, find the probability that their average time is between 23.7212 and 24.9212<br>minutes. 0.4611<br>f. Find the probability that the randomly selected 8 person team will have a total time less than 186.4.<br>0.2232<br>g. For part e) and f), is the assumption of normal necessary? O NoO Yes<br>h. The top 15% of all 8 person team relay races will compete in the championship round. These are the<br>15% lowest times. What is the longest total time that a relay team can have and still make it to the<br>championship round?<br>minutes<br>

Extracted text: The average time to run the 5K fun run is 24 minutes and the standard deviation is 2.6 minutes. 8 runners are randomly selected to run the 5K fun run. Round all answers to 4 decimal places where possible and assume a normal distribution. a. What is the distribution of X? X - N( 24 2.6 b. What is the distribution of ? - N( 24 0.9192 v c. What is the distribution of ) x? ) x - N( 192 7.3539 v) o d. If one randomly selected runner is timed, find the probability that this runner's time will be between 23.7212 and 24.9212 minutes. 0.1811 e. For the 8 runners, find the probability that their average time is between 23.7212 and 24.9212 minutes. 0.4611 f. Find the probability that the randomly selected 8 person team will have a total time less than 186.4. 0.2232 g. For part e) and f), is the assumption of normal necessary? O NoO Yes h. The top 15% of all 8 person team relay races will compete in the championship round. These are the 15% lowest times. What is the longest total time that a relay team can have and still make it to the championship round? minutes

Jun 07, 2022
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