Zip, Inc. manufactures Zip drives on two different manufacturing processes. Because the management of this company...

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Zip, Inc. manufactures Zip drives on two different manufacturing processes. Because the management of this company is interes

math Statistics-And-Probability

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Answer 1

Answer #1

a) We are testing,

H0: u1=u2 vs H1: u1<u2

b) Degrees of freedom of the t test: n1+n2-2 = 12+22-2= 32

c) Test statistic: (58-64)/√9^2/12+25^2/22= -1.012

d) Here we have alpha=0.05

P-value of this one sided t test is:

P(t32<-1.012) = 0.1596

Since the p-value of this test >significance level of 0.05, we have insufficient evidence to reject H0. So we fail to conclude that u1<u2

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Answer 2

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