Mathematics, 06.12.2019 02:31 zackarygonzalez1028
Aresearch firm supplies manufacturers with estimates of the sales of their products from samples of stores. marketing managers often look at the sales estimates and ignore sampling error. an srs of 50 stores this month shows mean sales of 41 units of a particular appliance with a standard deviation of 11 units. during the same month last year, an srs of 52 stores gave mean sales of 38 units of the same appliances with a standard deviation of 13 units. an increase from 38 to 41 is a rise of 7.9 % . the marketing manager is happy because sales are up 7.9 % . (a) give a 95 % confidence interval for the difference in mean number of units of the appliance sold at all retail stores. (enter your answer rounded to three decimal places.) lower interval: upper interval:
Answers: 1
Mathematics, 21.06.2019 18:10
Which of these sequences is a geometric sequence a 1,2,4, 7, 11, 16, 22. b. 2.4.8.14.22.38 c.3.6.9. 15.18,21 d. 3,9,27,81,243,729,
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Mathematics, 21.06.2019 21:40
Drag the tiles to the correct boxes to complete the pairs. using the properties of integer exponents, match each expression with the correct equivalent expression.
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Mathematics, 21.06.2019 22:20
(b) suppose that consolidated power decides to use a level of significance of Ξ± = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is xβ―β― = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume Ο = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)
Answers: 2
Mathematics, 21.06.2019 22:30
Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2 acellus answer
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Aresearch firm supplies manufacturers with estimates of the sales of their products from samples of...
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