2. The sum of two numbers is 67. The
smaller number is 13 less than the larger
number. What...
Mathematics, 08.02.2022 04:50 paigejosie6473
2. The sum of two numbers is 67. The
smaller number is 13 less than the larger
number. What are the two numbers?
Answers: 1
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What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?
Answers: 2
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An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.
Answers: 3
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1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?
Answers: 2
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