Solved: Testing the difference between two means, Basic Statistics

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Testing the difference between two means

Discussion:

Q1: Explain the difference between testing a single mean and testing the difference between two means.

Q2: What two assumptions must be met when one is using z test to test differences between two means?

Q3: When can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2 ?

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