In a random sample, s = 2.53 minutes for the amount of time that 30 women took to complete the writ-ten test for their driver’s licenses. At the 0.05 level of significance, test the null hypothesis σ = 2.85 minutes against the alternative hypothesis σ < 2.85 minutes. (Use the method described in the text.)
Answer to relevant QuestionsWith reference to Exercise 13.4, find the required size of the samples when σ1 = 9, σ2 = 13, ∂ = 80, ∂t = 86, α = 0.01, and β = 0.01. With reference to Exercise 13.42, test at the 0.02 level of significance whether it is reasonable to assume that the two populations sampled have equal variances. In exercise To compare two kinds of front- end designs, six ...With reference to Exercise 13.61, find the critical region and the actual level of significance corresponding to this critical region. In exercise In a random sample, 12 of 14 industrial accidents were due to unsafe working ...Making use of the result of Exercise 8θ28 on page 250, show that for large random samples from normal populations, tests of the null hypothesis σ2 = σ20 can be based on the statistic Which has approximately the standard ...The following sample data pertain to the shipments received by a large firm from three different vendors: Test at the 0.01 level of significance whether the three vendors ship products of equal quality.
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