C. At least 3 heads? d. Getting 2 or 3 heads? e. Pure heads? f. No heads? WHAT I CAN DO ACTIVITY 3. A. Find the mean, variance, and standard deviation of the following probability distribution by completing the table below. (Page 25) (14 POINTS) X . P(X) X - H (X - ( ) ? ( X - H ) ? X m CO m 2/7 1/7 A. What is the MEAN? ANSWER: 3. What is the variance? ANSWER: C. What is the standard deviation? ANSWER: ASSESSMENT (POST TEST) MULTIPLE CHOICE. Write the letter of your answer on the space provided after the number. (15 points)