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'''Question:''' | '''Question:''' | ||
* Suppose you take a coin from the Random Coin Machine and toss is. What is the probability of flipping a heads? | * Suppose you take a coin from the Random Coin Machine and toss is. What is the probability of flipping a heads? | ||
| − | * P(H) = <math>= \int_{0}^{1}P(H|Q=q) * | + | * P(H) = <math>= \int_{0}^{1}P(H|Q=q) * f<sub>Q</sub>(q) dq</math><br> |
'''Answer:''' | '''Answer:''' | ||
Revision as of 04:40, 11 October 2008
Set-Up:
- Suppose you have a machine that produces random coins. (Thus, the probability of taking a coin from the machine, tossing it, and getting a 'heads' is a random variable.
- Suppose fQ(q)= 2q for 0<q<1
- If Q = q then P(H|Q=q) = q
- Below graph:
fQ(q) vs q
Question:
- Suppose you take a coin from the Random Coin Machine and toss is. What is the probability of flipping a heads?
- P(H) = $ = \int_{0}^{1}P(H|Q=q) * f<sub>Q</sub>(q) dq $
Answer:
