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Exercise

Exercise. Find quality estimates for round 3 (Estonia) items B37, B38 and B39. If observed correlations between B37 and B38 is .439; B37 and B39 is .441; B38 and B39 is .470; What would be true correlations, after correction for measurement error?. Exercise. real ρ. q=√q 2. x. y.

karina-baldwin
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Exercise

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  1. Exercise • Find quality estimates for round 3 (Estonia) items B37, B38 and B39. • If observed correlations between B37 and B38 is .439; B37 and B39 is .441; B38 and B39 is .470; What would be true correlations, after correction for measurement error?

  2. Exercise real ρ q=√q2 x y q1 q2 x1 y1 obs ρ obs ρ = q1 * real ρ * q2 real ρ = obs ρ / q1*q2 If x1 and y1 have same method, the method effect should also be taken into account!

  3. Exercise

  4. Exercise • Extra assignment • B5 and B7 round 2 (Estonia) • If observed correlation is .551, what is the real correlation?

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