Testing single mean and testing difference between two means

Reference no: EM13111875

Explain the difference between testing a single mean and testing the difference between two means. What two assumptions must be met when one is using z test to test differences between two means? When can the sample standard deviations s 1 and s 2 be used in place of the population standard deviations s 1 and s 2 ?

Reference no: EM13111875

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