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A ballet instructor is interested in knowing what percent of each year's class will continue on to the next, so that she can plan what classes to offer. Over the years,she has established the following probability distribution.
Complete the table below using the data provided.
| x | P(x) | x*P(x) |
|---|---|---|
| 1 | 0.10 | |
| 2 | 0.05 | |
| 3 | 0.10 | |
| 4 | ||
| 5 | 0.30 | |
| 6 | 0.20 | |
| 7 | 0.10 |
In words, define the Random Variable .
On average, how many years would you expect a child to study ballet with this teacher?
What does the column " " sum to and why?
What does the column " " sum to and why?
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