STAT151 Lecture Notes - Bernoulli Trial, Standard Deviation
7 Oct 2013
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Chapter 16: random variables | chapter 17: probability models. If you toss a coin 3x, these are the outcome probabilities: The sum of all the outcome probabilities is equal to 1: each outcome probability has a value between 0 and 1. These outcomes are considered disjoint events because x" can only take on 1 value at a time. If you were to toss a hypothetical unfair coin, then the distribution would be skewed and the interpretation of the mean would be less useful: mean is affected by outliers. Permutation # of ordered sequence of the elements in a set: 3! There are 5 letters so the answer is: = 5 * 4 * 3 * 2 * 1 = 120 ways. If the size of the set is changeable and you wanted to see how many r- letter words you can get out of a group of n letters, the equation you would use is:
