SOA Exam P Sample Question 525
Study guide: Exam P-1
The joint distribution of television viewers' habits in the two entertainment categories of Sports and Movies and the one non-entertainment category of News is:
Regularly watches Sports:
| Regularly watches News | Does not regularly watch News | |
|---|---|---|
| Regularly watches Movies | 0.35 | 0.10 |
| Does not regularly watch Movies | 0.08 | 0.06 |
Does not regularly watch Sports:
| Regularly watches News | Does not regularly watch News | |
|---|---|---|
| Regularly watches Movies | 0.22 | 0.06 |
| Does not regularly watch Movies | 0.05 | 0.08 |
Calculate the variance of the number of entertainment categories regularly watched by those television viewers who regularly watch News.
- A)
0.242 - B)
0.388 - C)
0.400 - D)
0.478 - E)
0.571
Answer this question and see the worked solution
Concepts tested
- Variance for Conditional and Marginal Distributions
- Conditional Probability
- Joint Probability Function
- Variance and Standard Deviation