Consider fitting a random intercepts model in a study examining the blood pressure of individuals over time. The study effect is normally distributed with mean 0 and variance 25, and the error is normally distributed with mean 0 and variance 40. what is the intraclass correlation (ICC) ? a. less than 0.4 b. between 0.4 and 0.5 c. between 0.5 and 0.6 d. between 0.6 and 0.7 e. greater than 0.7