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5.46Probability and coin flips: Short-run proportions are often quite different from long-run probabilities. Explain why we would expect proportions to fluctuate in the short run,
5.46Probability and coin flips:Short-run proportions are often quite different from long-run probabilities.
- Explain why we would expect proportions to fluctuate in the short run, but why long-run probabilities are more predictable.
- What is the expected long-run probability of heads if a person flips a coin many, many times? Why?
- Flip a coin 10 times in a row. What proportion is heads? Do this 5 times. Note: You will learn more by actually doing it, so don't just write down numbers!
Proportion for the first 10 flips:
Proportion for the second 10 flips:
Proportion for the third 10 flips:
Proportion for the fourth 10 flips:
Proportion for the fifth 10 flips:
- Are the proportions in part (c) matching the expected long-run probability in part (b)? Why or why not?
- Imagine that a friend flipped a coin 10 times, got 9 out of 10 heads, and complained that the coin was biased. Explain to your friend the difference between short-term and long-term probability?
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