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Probability &amp; Chi Square

# Probability &amp; Chi Square - Elementary Statistics...

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p x q n-x Elementary Statistics and Probability Analysis PROBABILITY:  the number of times a particular event occurs, divided by the total  number of opportunities for the event to occur.       Example:  If a coin is flipped an infinite amount of time the probability that you would get  heads is 0.5   and the probability that you would be tails is 0.5 .    SUM RULE:  the combined probability of two (or more) mutually exclusive events  occurring is the sum of their individual properties.             Example:  heads and tails are examples of mutually exclusive events. In other words, if a  tail is flipped, that excludes the possibility of a head being flipped on the same  coin at the same time (also the same with gametes). Prob. (head or tail) = prob, (head) + Prob. (tail) 1.0 = 0.5 + 0.5 PRODUCT RULE:  the joint probability of both of two independent events occurring  simultaneously is the product of their individual probabilities. •       Example:  What is the probability of obtaining a head on both a nickel and a penny? Prob. of two heads = Prob. (head on penny) x Prob. (head on nickel)

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Probability &amp; Chi Square - Elementary Statistics...

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