Statistics
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Boundless Statistics
Estimation and Hypothesis Testing
Statistics Textbooks Boundless Statistics Estimation and Hypothesis Testing
Statistics Textbooks Boundless Statistics
Statistics Textbooks
Statistics

Section 6

Hypothesis Testing: Two Samples

Book Version 1
By Boundless
Boundless Statistics
Statistics
by Boundless
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6 concepts
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Using Two Samples

To compare two means or two proportions, one works with two groups.

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Comparing Two Independent Population Means

To compare independent samples, both populations are normally distributed with the population means and standard deviations unknown.

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Comparing Two Independent Population Proportions

If two estimated proportions are different, it may be due to a difference in the populations or it may be due to chance.

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Comparing Matched or Paired Samples

In a hypothesis test for matched or paired samples, subjects are matched in pairs and differences are calculated.

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Comparing Two Population Variances

In order to compare two variances, we must use the $F$ distribution.

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Determining Sample Size

A common problem is calculating the sample size required to yield a certain power for a test, given a predetermined type I error rate $\alpha$.

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