Mathematics, 17.09.2019 21:00 jamayeah02
Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. the mean shopping time, , spent by customers at the supermarkets has been reported to be minutes, but executives hire a statistical consultant and ask her to determine whether it can be concluded that is greater than minutes . to perform her statistical test, the consultant collects a random sample of shopping times at the supermarkets. she computes the mean of these times to be minutes and the standard deviation of the times to be minutes. based on this information, answer the questions below. what are the null hypothesis () and the alternative hypothesis () that should be used for the test? : is : is in the context of this test, what is a type i error? a type i error is the hypothesis that is when, in fact, is . suppose that the consultant decides not to reject the null hypothesis. what sort of error might she be making?
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Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8
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John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11
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Mathematics, 21.06.2019 20:30
Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?
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