Mathematics, 22.04.2020 00:59 alaynajk04
Use this information to answer the following 6 questions: A study is being conducted to compare the average training time for two groups of airport security personnel: those who work for the federal government and those employed by private security companies. From a random sample of 12 government-employed security personnel, average training time was 72 hours, with a sample standard deviation of 8 hours. In a random sample of 16 privately employed security personnel, training time was 65.4 hours, with a sample standard deviation of 12.3 hours. Assume that training time for each group is normally distributed. Use the following notations: μ1: The mean training time for the population of airport security personnel employed by the federal government. μ2: The mean training time for the population of airport security personnel employed by private security companies. The goal of the statistical analysis is to determine whether the sample data support the hypothesis that average training time for government-employed security personnel is higher than those employed by private security companies.
Answers: 1
Mathematics, 21.06.2019 12:30
Aschool typically sells 500 yearbooks each year for 50 dollars each. the economic calls does a project and discovers that they can sell 100 more yearbooks for every $5 decrease in price. the revenue for yearbook sales is equal to the number of yearbooks sold times the price of the yearbook. let x represent the number of $5 decrease in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). to maximize profit, what price should the school charge for the yearbooks? what is the possible maximum revenue? if the school attains the maximum revenue, how many yearbooks will they sell?
Answers: 3
Mathematics, 21.06.2019 21:00
What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3
Answers: 2
Mathematics, 22.06.2019 03:00
What is the approximate difference in tenths between √12 and √15?
Answers: 1
Use this information to answer the following 6 questions: A study is being conducted to compare the...
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