**Q8: **

Let denote a discrete random variable which can take the values . Given that has probability distribution function , find the standard deviation of . Give your answer to 2 decimal places.

**Q9: **

**Q10: **

**Q11: **

Let denote a discrete random variable which can take the values . Given that has probability distribution function , find the variance of .

- A
- B
- C0
- D

**Q12: **

Let denote a discrete random variable which can take the values . Given that has probability distribution function , find the variance of .

- A
- B
- C
- D

**Q13: **

Let denote a discrete random variable which can take the values 2, 4, and 5. Given that has probability distribution function , find the variance of . If necessary, give your answer to two decimal places.

**Q14: **

The function in the given table is a probability function of a discrete random variable . Find the variance of . If necessary, give your answer to two decimal places.

3 | 5 | 7 | 8 | |

**Q15: **

The function in the given table is a probability function of a discrete random variable . Find the variance of . If necessary, give your answer to two decimal places.

1 | 3 | 5 | 7 | |

**Q16: **

The function in the given table is a probability function of a discrete random variable . Given that the expected value of is , find the variance of . Give your answer to two decimal places.

1 | 2 | 7 | ||