The following computer output (from MINITAB) presents the results of a hypothesis test for the difference 1

The following computer output

(from MINITAB) presents the results of a hypothesis test for the difference μ1 − μ2 between two population means:

a. What is the alternate hypothesis?

b. Can H0 be rejected at the α = 0.05 level? Explain.

c. How many degrees of freedom are there for the test statistic?

d. Use the simpler method to compute the degrees of freedom as the smaller of n1 − 1 and n2 − 1.

e. Find the P-value using this value for the degrees of freedom.

Transcribed Image Text:

Two-sample T for X1 vs X2 N Mean StDev SE Mean 22 X1 20 3.44 2.65 0.23 X2 25 4.43 2.38 0.18 Difference =mu (X1)mu (X2) Estimate for difference: -0.99 95% upper bound for difference: T-Test of difference = 0 (vs