MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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- The mean time for a group of adults to complete a certain achievement test is 38.8 minutes and the standard deviation is 7 minutes. Assume the variable is normally distributed, find the probability that the mean of 50 randomly selected adults finished the test in less than 35 minutes? The mean time for a group of adults to complete a certain achievement test is 38.8 minutes and the standard deviation is 7 minutes. Assume the variable is normally distributed, find the probability that the mean of 50 randomly selected adults finished the test in less than 35 minutes? 6.19 x 10-5 0.2936 0.7064 0.9999arrow_forwardAssume that a nomral distribution has a mean of 22 and a standard deviation of 7. What percentage of the values are in the distribution do we expect to fall between 15 and 22?arrow_forwardYou want to estimate the average size of the shoes of kids going to your bowling alley so you can stock the right number of rental shoes. You take a random sample of 8 kids exiting the alley, and find that their sizes are: 2,3,4,5,6,6,7,7. Assume that sizes are roughly normally distributed and that the mean is 5. Calculate the sample standard deviation. Include at least one decimal place.arrow_forward
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