A researcher wants to evaluate the effectiveness of cognitive behavior therapy which he thinks will decrease...

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A researcher wants to evaluate the effectiveness of cognitivebehavior therapy which he thinks will decrease depression scores.Prior to testing, each of n = 10 patients rated their current levelof depression on a self-report survey. After attending cognitivebehavior therapy for a month, a second rating is recorded. The dataare as follows:
Â Â Â Â Â Â Â Â Â Â BeforeÂ Â Â After
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â 2
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 7Â Â Â Â Â Â Â Â Â Â 7
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 10Â Â Â Â Â Â Â Â Â 7
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 14Â Â Â Â Â Â Â Â Â 10
Â Â Â Â Â Â Â Â Â Â Â Â
Do the results indicate a significantdifference? Use Î± = .01. If so, what percent of the decrease isactually due to the therapy?

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3.8 Ratings (643 Votes)

Given that null H0 Ud 0 alternate H1 Ud 0 level of significance 001 from standard normal table two tailed t 2 5841 since our test is twotailed reject Ho if to 5841 OR if to See Answer

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