## ← 30-18 Mean_Outcome

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30-18 Mean_Outcome

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Showing Revision 2 created 11/02/2015 by Udacity Robot.

1. Let's go back to probability and go back to our simplest of all examples--that of a coin flip.
2. Assume that p is the probability that the coin comes up heads and assume we flip the coin N times--
3. that is the same as saying that a sample size of N.
4. It gives us N outcomes and in the past, we computed the empirical mean, the variance,
5. but now I will let you compute the confidence interval.
6. Let's start--I'm going to ask you a series of questions, most of them are fairly challenging,
7. and at the end you'll be able to compute the confidence interval for a sample size N of coin flips.
8. Let me begin. What is the expected mean outcome when you flip this coin?
9. Suppose one is heads, 0 is tails--either comes up, it's is 0.5 chance.
10. This could be a number where the number scales between 0 and 1.
11. It would be 0 if the expected outcome is always tails and be 1 if the expected outcome is always heads.