Calculating the Expected Value of a Discrete Distribution
A discrete random variable \(X\) has the following probability distribution: \(P(X=1) = 0.2\) \(P(X=2) = 0.5\) \(P(X=3) = 0.3\) Calculate the expected value \(E(X)\).
Composite Reliability Index Calculation
A researcher developed a new questionnaire to measure social anxiety. To assess its reliability, they used two methods: test-retest reliability and internal consistency. The test-retest reliability, conducted two weeks apart, yielded a correlation coefficient of 0.80. The internal consistency, measured using Cronbach’s alpha, was found to be 0.75. To obtain a more comprehensive measure of […]