Recent research has found that diseases that appear as we age may be a result of which of the following?

One sample has n = 10 scores and a variance of s2 = 20, and a second sample has n = 15 scores and a variance of s2 = 30.What can you conclude about the pooled variance for these two samples?

A) ?It will be closer to 20 than to 30. B) ?It will be closer to 30 than to 20. C) ?It will be exactly half way between 20 and 30. D) ?It will be equal to 25.

Before enrolling in an abnormal psychology course, Tod's idea of psychological disorders had been influenced primarily by talk shows. He expected to hear the same kinds of stories he had heard on talk shows. What an eye-opening experience the course turned out to be! How would a cognitive psychologist describe the influence the course had on Tod's idea of psychological disorders?

A. Tod learned the value of algorithms. B. Tod now uses heuristics. C. The course increased Tod's ability to use visual imagery. D. The course altered Tod's concept of psychological disorders.