Comparing Two Means: T-Tests

Introduction to T-Tests

If you are comparing the mean of a continuous dependent variable across two categories, then you can achieve this through t-tests. Also, as we saw in the previous section, there are various scenarios for comparing two means through t-tests, including:
  • Comparing means of two independent groups. In the main textbook example, the variable License divides the sample into two groups that are unrelated. In other words, any given customer can be either a Premium or a Freeware customer. Our aim would be to compare average Sales between these two groups.
  • Comparing means of two related groups. It is also possible to compare means between two related samples. An example of this is where ...

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