Two processes in a manufacturing line are performed manually: operation A and operation B.A random sample of 50 different assemblies using operation A shows that the sample average time per assembly is 8.05 minutes, with a population standard deviation of 1.36 minutes. A random sample of 38 different assemblies using operation B shows that the sample average time per assembly is 7.26 minutes, with a population standard deviation of 1.06 minutes. For α = .10,is there enough evidence in these samples to declare that operation A takes significantly longer to perform than operation B?
Answer to relevant QuestionsUse the data given and the eight-step process to test the following hypotheses.H0: µ1 - µ2 = 0 ....... Ha: µ1 - µ2 < 0Sample 1 ... Sample 2n1 = 8 ...... n2 = 11x̄1 = 24.56 ... x̄2 = 26.42s21 = 12.4 .... s22 = ...According to an Experiential Education Survey published at JobWeb.com, the average hourly wage of a college student working as a co-op is $15.64 an hour and the average hourly wage of an intern is $15.44.Assume that such ...Construct a 98% confidence interval to estimate D from the following sample information. Assume the differences are normally distributed in thepopulation.Using the given sample information, test the following hypotheses. a. H0: p1 – p2 = 0.......Ha: p1 – p2 ≠ 0Sample 1 .... Sample 2n1 = 368 ... n2 = 405x1= 175 ... x2 = 182Let α = .05. x is the number in the sample ...Test the following hypotheses by using the given sample information and α = .05. Assume the populations are normally distributed.H0: σ21 = σ22 .......Ha: σ21 ≠ σ22n1 = 5, ....... n2 = 19, .......s1 = 4.68, .......s2 = ...
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