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statistic/Psychology

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According to classical test theory if the observed variance of a test is 50 and the true variance is 40 what is the estimated reliability of the test?
a. 0.40
b. 0.50
c.0.80
d. 0.90

  • statistic/Psychology - ,

    Reliability = True variance/Observed variance

    Therefore:
    R = 40/50 = .8

  • statistic/Psychology - ,

    0.40

  • statistic/Psychology - ,

    R=0.8

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