How does the five-step procedure for hypothesis testing differ when comparing two groups using a t-...

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How does the five-step procedure for hypothesis testing differ when comparing two groups using a t- or z-test? How is the process similar?

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How does the five-step procedure for hypothesis testing differ when comparing two groups using a t- or z- test? How is the process similar?
Answer:
Five-step procedure using a z-test
1) State the hypotheses.
Null Hypothesis (Ho): µ1 = µ2 (two population means are equal)
Alternative Hypothesis (Ha): µ1 ≠ µ2) (two population means are not equal).
                                          µ1  µ2 (right-tailed)
2) Choosing the α-level
Typically 0.05, sometimes 0.10 or 0.

How does the five-step procedure for hypothesis testing differ when comparing two groups using a t- or z- test? How is the process similar?

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