Chapter 10 notes.doc - Chapter 10 \u2013 Two-Sample Tests Section 10.1 \u2013 Comparing the Means of 2 Independent Populations If you assume that the samples

Chapter 10 notes.doc - Chapter 10 u2013 Two-Sample Tests...

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Chapter 10 – Two-Sample Tests Section 10.1 – Comparing the Means of 2 Independent PopulationsIf you assume that the samples are randomly and independently selected from populations that are normally distributed, this statistic follows the standardized normal distribution.For the z test, you know the standard deviation or variance from the population.For the t test, you know the standard deviation or variance from the sample.For these next tests, we are testing the null hypothesis of no difference in the means of 2independent populations against an alternative.t test statistic with pooled variance for the difference between 2 means:

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