Using the Power and Sample Size tool for a 2-Sample t-test
Here, we will use the power and sample size tools to find the number of samples needed to observe a difference in the means between two populations.
We will not need to open a dataset for this recipe. Using a standard deviation that has been set to 1, we will discover the number of samples required to observe a 1, 2, or 3 standard deviation difference between two population means.
How to do it…
The following steps will help us find the sample size required to detect differences of 1, 2, or 3 standard deviations between the means of two samples:
- Go to the Stat menu and then Power and Sample Size and then select 2 Sample t….
- Fill out the dialog box as shown in the following screenshot:
- Click on ...
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