Use the probability distribution to answer the questions.

x	P(x)
0	0.02
1	0.13
2	0.31
3	0.27
4	0.15
5	0.09
6	0.03

1. What is the probability x being 4?
2. What is the probability x being at least 2?
3. Is x = 0 an unusual outcome? Explain in 1 - 2 complete sentences.
4. Find the mean of the probability distribution
5. Find the standard deviation of the probability distribution
6. Use the range rule-of-thumb to find the limits of significant numbers of high or low scores