Lecture 7 Chap 6 S10

# Lecture 7 Chap 6 S10 - Chapter 6 Probability Spring 2010...

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Probability Probability is a method for quantifying the likelihood of obtaining a specific sample from a specific population. The probability of a specific outcome is a fraction or a proportion of all possible outcomes. Outcomes need to be obtained by a process of random sampling. Sampling with replacement

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Probability (cont.) Whenever the scores in a population are variable it is impossible to predict exactly which score or scores will be obtained when you take a sample from the population. Thus, researchers rely on probability to determine the relative likelihood for specific samples. Although you can’t predict exactly which value(s) will be obtained for a sample, it is possible to determine which outcomes have high probability and which have low probability.
In a frequency distribution, probabilities can be defined by proportions of the distribution. In graphs, probability can be defined as a

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Lecture 7 Chap 6 S10 - Chapter 6 Probability Spring 2010...

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