Imagine a scenario where 100 people complete a self-esteem measure. Assume the stan-dard deviation of their true scores is 22.17 and the variance of the random errors associated with responses is 511.48. What is the reliablity of these scores? (a) 0.55 (b) 0.49 (c) 0.57 (d) 0.42

4. Imagine a scenario where 100 people complete an optimism measure. The standard deviation of their observed scores is 31.03. Assume the variance of the random errors associated with responses is 346.83. What is the reliablity of these scores? (a) 0.64 (b) 0.77 (c) 0.56 (d) 0.55