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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. (Round your answers to two decimal places.)

First Score 75 87 60 75 98 80 68 84 47 72
Second Score 73 91 53 76 95 77 71 81 54 69

(a) Find r.


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

lower limit    
upper limit    

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orchestra answered 1 year ago
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