Question

The test-retest method is one way of establishing the reliability of a test. The test is...

The test-retest method is one way of establishing the reliability of a test. The test is administered, and then, at a later date, the same test is re-administered to the same individuals. The correlation coefficient is computed between the two sets of scores. The following test scores were obtained in a test-retest situation. (Give your answers correct to two decimal places.)

First Score 84 88 94 95 97 73 77 64 93 92
Second Score 59 64 59 53 73 68 53 74 84 76

(a) Find r.


(b) Set a 95% confidence interval for ρ.

Lower Limit -

Upper Limit -

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