The average time to run the 5K fun run is 21 minutes and the standard deviation is 2.7 minutes. 17 runners are randomly selected to run the 5K fun run. Round all answers to 4 decimal places where possible and assume a normal distribution.
The average time to run the 5K fun run is 21 minutes and the standard deviation...
The average time to run the 5K fun run is 23 minutes and the standard deviation is 2.7 minutes. 44 runners are randomly selected to run the 5K fun run. Round all answers to 4 decimal places where possible and assume a normal distribution. What is the distribution of X ? X ~ N( , ) What is the distribution of ¯ x ? ¯ x ~ N( , ) What is the distribution of ∑ x ? ∑ x...
The average time to run the 5K fun run is 22 minutes and the standard deviation is 2.3 minutes. 47 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-NI b. What is the distribution of æ? - NCI c. What is the distribution of «? *-N d. If one randomly selected runner is timed, find the probability...
V 7.2 Due in 5 hours, 3 minutes. Due Thu 07/30/2020 11:59 pm al Points Possible: 2 estions Question 1 (0/1) Question 2 (0.771) de: 0.7/2 The average time to run the SK fun run is 24 minutes and the standard deviation is 2.7 minutes. 43 runners are randomly selected to run the SK fun run. Round all answers to 4 decimal places where possible and assume a normal distribution a. What is the distribution of X? X-NI b. What...
22) Runner's World magazine wanted to find out what the average 5k running time was for recreational runners. To estimate this, they took a random sample of 64 runner's times from a database of recreational 5k races across the country. This sample resulted in a sample mean (X) of 28 minutes with a sample standard deviation of 5 minutes. Calculate a 95% confidence interval around the mean. (5 points)
8. (10 points) Suppose that (26 miles) in an average of 145 minutes with a standard deviation of 14 minutes. Consider 49 randomly selected runners of this category in a particular race. Let X = the average of the 49 a category of world-class runners are known to run a marathon runners' times (a) What does the central limit theorem say about the distribution of x? (b) Find the probability that the 49 (c) Would you be surprised if one...
The average score for games played in the NFL is 20.8 and the standard deviation is 9.3 points. 46 games are randomly selected. Round all answers to 4 decimal places where possible and assume a normal distribution. What is the distribution of ¯xx¯? ¯xx¯ ~ N( ___ , ____ ) What is the distribution of ∑x∑x? ∑x∑x ~ N( ____ , ____ ) P(¯xx¯ > 19.7432) = _____ Find the 62th percentile for the mean score for this sample size....
The average score for games played in the NFL is 20.5 and the standard deviation is 9.1 points. 47 games are randomly selected. Round all answers to 4 decimal places where possible and assume a normal distribution. What is the distribution of ¯xx¯? ¯xx¯ ~ N( ____ , ____ ) What is the distribution of ∑x∑x? ∑x∑x ~ N( ____ , ____ ) P(¯xx¯ > 20.7089) = ____ Find the 68th percentile for the mean score for this sample size....
Los Angeles workers have an average commute of 33 minutes. Suppose the LA commute time is normally distributed with a standard deviation of 13 minutes. Let X represent the commute time for a randomly selected LA worker. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that a randomly selected LA worker has a commute that is longer than 32 minutes. c. Find the 75th percentile...
Los Angeles workers have an average commute of 31 minutes. Suppose the LA commute time is normally distributed with a standard deviation of 15 minutes. Let X represent the commute time for a randomly selected LA worker. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that a randomly selected LA worker has a commute that is longer than 37 minutes. c. Find the 85th percentile...
Los Angeles workers have an average commute of 32 minutes. Suppose the LA commute time is normally distributed with a standard deviation of 13 minutes. Let X represent the commute time for a randomly selected LA worker. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that a randomly selected LA worker has a commute that is longer than 29 minutes. c. Find the 90th percentile...