STATS 2B03 Lecture Notes - Random Variable
19 Jun 2013
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Example: they are right handed given that both parents are right handed. The data suggests that if both parents are right handed then the children have a higher chance of being right handed. Random variable (rv): x is a quantity whose values arise as a result of chance factors. : x=#of boys in a family of 3 children, x=adult height, anything that you can"t predict in advance. A r. v. is discrete if we can list all of its possible values. : x=#of boys in a family of 3 children (0,1,2,3), cannot list all possible values of someone"s height. A probability distribution for a discrete random variable x is a listing of the values of x, along with their probabilities. Example: two people are selected from a group of 5 men and 8 women. Let x be the number of men selected. Bernouilli trial is a random process with only two possible outcomes of interest, called success or failure .
