MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Theaveragenumberofdrop-outsforaschooldistrict has been 305 per year with a standard deviation of 50. What is the
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between 250 and 350? ___________
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between 300 and 350? ___________
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between 350 and 375? ___________
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- Americans on average drink 78 gallons of coffee individually each year, with a standard deviation of 13 gallons. Assume the population of amounts of coffee drank by Americans individually is normally distributed. If a sample of 15 Americans is taken, what is the probability that the sample mean amount of coffee drank individually will be more than 80 gallons? ? ( x̅ > 80 ??????? ) Round your final answer to four decimal places. = ______________arrow_forward******** ***** Over the past five years the mean age at death in the United States has been 72.5 years. In a random sample of the biographies of 25 "famous persons" who died in this period, the mean age at death was 73.5 years with the sample standard deviation of s=2.8 years. Test the hypothesis that famous people o The average live longer than the rest of a us? (a =.05)¶arrow_forwardA jar contains 3 nickels and 2 dimes. You reach in and randomly select 2 coins. Let Xrepresent the value of the two coins in cents. Find [a] theexpected value of Xand [b] the standard deviation of X.Round answers to 2 decimals. [a] Expected Value: __________ [b] Standard Deviation: __________arrow_forward
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