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Standard Measure of Error (SME): Presume the standard deviation is 7 for test X with Cronbach's Coefficient Alpha of 0.90. The standard deviation for test

Standard Measure of Error (SME): Presume the standard deviation is 7 for test X with Cronbach's Coefficient Alpha of 0.90. The standard deviation for test Z is 5 with a Cronbach's Coefficient Alpha of 0.70.

6.1 What are the SME for tests X and Z? [4]

6.2 Calculate the 95% confidence intervals for the observed scores of test x only.

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