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Find the probability that the sprinkler system will come on
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Of 10,000 students at a college, 2,500 have a Mastercard (M)m 4000 have a VISA and 1,000 have both. Find the probability that a randomly selected student has neither credit card.
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A sprinkler system inside an office building has two types of activation devices, D1 and D2, which operate independently. When there is a fire, if either device operates correctly, the sprinkler system is turned on. In case of a fire, the probability that D1 operates correctly is 0.95 and the...
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1. A sample of 35 golfers showed that their average score on a particular golf course was 80 with a standard deviation of 10. Answer each of the following (show all work): (A) Find the 99% confidence interval of the mean score for all 35 golfers. (B) Find the 99% confidence interval of the...
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A company administers an aptitude test for managers to aid in selecting new management trainees. Prior experience suggests that 60 percent of all applicants for management trainee positions would be successful if they were hired. Furthermore, past experience with the aptitude test indicates...
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30) Three data entry specialists enter requisition into a computer. Specialist 1 processes 30% of the requisitions, specialist 2 processes 45%, and specialist 3 processes 25%. The proportions of incorrectly entered requisitions by data entry specialists 1, 2, and 3 are 0.03, 0.05, and 0.02,...
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27) A sprinkler system inside an office building has two types of activation devices, D1 and D2, which operate independently. When there is a fire, if either device operates correctly, the sprinkler system is turned on. In case of fire, the probability that D1 operates correctly is 0.95, and the...
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statistically significant by z test suppose that in one city, 10% of the people are black suppose too that every firm in the city hires
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A sample of 270 batteries for a hand-held computer has a sample mean life of 56.0 hours and a sample standard deviation = 5.60 hours, find the upper limit of a 98%confidence interval estimate of the true population mean life
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- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
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