# Paired t-test

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The self-help skill teaching for the primary parents of a random sample of families with mentally retarded children before and after training program.

Before 07 06 10 16 08 13 08 14

After 11 14 16 17 09 15 09 17

Based on this information, can you conclude that the training program is effective? Use a significance level of 0.05. Does the data enable you to reject or not to reject the null hypothesis?

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##### Solution Summary

This solution shows details of how to conduct a paired t-test and to complete the calculations by hand.

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