week 10 discussion math statistics 300 - What two assumptions must be met when you are using the z test to test differences between two means Can the

week 10 discussion math statistics 300 - What two...

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What two assumptions must be met when you are using the z test to test differences between two means? Can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2? 1. The samples must be independent of each other. That is, there can be no relationship between the subjects in each sample. 2. The populations from which the samples were obtained must be normally distributed, and
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