Texts: Viola takes a scale measuring happiness and then takes it again the next day and receives a similar score. This would suggest that the scale has good test-retest reliability.
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Step 1: Viola takes a scale measuring happiness. Show more…
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Inter-Rater Reliability- when you want to know whether there is consistency among different people who score the same test What is an example of a inter-rater reliability?
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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 readministered 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. $$\begin{array}{lllllllllll} \text { First Score } & 75 & 87 & 60 & 75 & 98 & 80 & 68 & 84 & 47 & 72 \\ \hline \text { Second Score } & 72 & 90 & 52 & 75 & 94 & 78 & 72 & 80 & 53 & 70 \end{array}$$ Find $r$ and set a $95 \%$ confidence interval for $\rho$.
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