**Q1: **

The function in the given table is a probability function of a discrete random variable . Find the standard deviation of . Give your answer to two decimal places.

**Q2: **

0 | 2 | |||

**Q3: **

1 | ||||

**Q4: **

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

4 | 6 | 10 | |

**Q5: **

0 | 2 | |||

**Q6: **

2 | ||||

**Q7: **

The function in the given table is a probability function of a discrete random variable . Given that the expected value of is 6.5, find the standard deviation of . If necessary, give your answer to two decimal places.

3 | 6 | 8 | ||

0.2 | 0.1 | 0.1 | 0.6 |

**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 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 .

- A0
- B
- C
- 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 | ||