Chapter11

# Chapter11 - Chapter 11 Understanding Randomness What does...

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Chapter 11 Understanding Randomness

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What does it mean for something to be random? Children games: Rolling dice, Spinning a wheel, Shuffling cards, etc. Adult games: Poker, Lottery, Bingo, etc. What’s the most important aspect of randomness in these games? It must be fair.
What is it about random selection that makes it fair? 1. Nobody can guess the outcome before it happens. 2. Usually some underlying outcomes will be equally likely.

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Randomness is an essential tool of Statistics.
Random Numbers For this Chapter, we like to work on problems that deals with Random Numbers. So how should we generate numbers? It’s surprisingly difficult. We may create our own but we may think of putting values that haven’t been used in a while even though each number is equally likely.

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(cont.) We can have a computer generate some random numbers but they undergo a program. Over time, it will have to repeat the program and may use the same numbers again. Hence, the random numbers we’ll use is from a Table of Random Digits.
Example that starts on p. 292 Suppose a cereal manufacturer puts pictures of famous athletes in hope of boosting sales. The manufacturer announces that

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