EDF5432 Spring 2002 Worksheet 2 Obtain values by using the five assumptions of Classical Theory, four different forms of reliability, and the facts; a. σ=, and b. 22XTσ+σ2E'XYX Yρ=ρ. 1. a. Given X= 10 and E= 2, what is T? T= X– E= 10 – 2 = 8b. Given and , what is 25T210X2Eσ? σ2E= σ2X– σ2T= 10 – 5 = 5c. Given and , what is 23T29X2XTρ? ρ2XT= ρXX’= σ2T/σ2X= 3/9 =0.33 d. Given and , what is 21E24X2XTρ? ρ2XT= ρXX’= 1 – σ2E/σ2X= 1 – 1/4 = 0.75 e. X and X' are parallel tests. Given 210Xσ=and '0.3XXρ=, what is ? What is ? σ2'XσXTρ2X’= σ2X= 10,
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