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Question 125:



No answer provided yet.They do not have to be equal. It is often the case that when collecting data, subjects don't show up, data goes missing etc. Uneven sample sizes are a fact of life, and they do not prevent you from testing differences in population parameters. If there is a large difference in sample sizes, this can affect the variance and lead to some problems. But just knowing the sample sizes are unequal does not preclude comparisons and using parametric statistics.

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