Mathematics

Mathematics, 25.07.2019 23:00, spcutey

Agives you the probability of support for your hypothesis based on your sample evidence and sample size. a. market test b. respondent test c. hypothesis test d. survey test

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Mathematics, 24.06.2019 23:00, drcarver

Consider the hypothesis test h0: μ1=μ2 against h1: μ1> μ2. suppose the sample size n1=10 and n2=10, thatx-bar1=7.8 and x-bar2=5.6 and that s^2 1=4 and s^2 2=9. assume thatσ^2 1=σ^2 2 and that the data are drawn from normaldistributions. use α=.05a. test the hypothesis and find the p-valueb. explain how the test could be conducted with a confidenceintervalc. what is the power of the test in part a if μ1 is 3 unitsgreater than μ2? d. assuming equal sample sizes, what sample size should be used toobtain β=.05 in μ1 is 3 units greater than μ2? assumethat α=.05

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Mathematics, 26.06.2019 20:40, kayolaaaa53

Ten randomly selected people took an iq test a, and next day they took a very similar iq test b. their scores are shown in the table below. person a b c d e f g h i j test a 106 99 95 92 87 127 115 100 77 108 test b 112 101 99 96 90 130 112 99 80 112 1. consider (test a - test b). use a 0.05 significance level to test the claim that people do better on the second test than they do on the first. (note: you may wish to use software.) (a) what test method should be used? a. two sample t b. two sample z c. matched pairs (b) the test statistic is (c) the critical value is (d) is there sufficient evidence to support the claim that people do better on the second test? a. yes b. no 2. construct a 95% confidence interval for the mean of the differences. again, use (test a - test b). < μ

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Mathematics, 27.08.2019 10:30, evaeh

David is a statistician. he has a sample size of 40 (which he cannot change). what element of his hypothesis test can he adjust to minimize the probability that he incorrectly rejects the null hypothesis? a. the mean of the population b. the mean of the sample c. the standard deviation of the population d. the significance level of the test

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