STAT200 Study Guide - Midterm Guide: Random Variable, Squared Deviations From The Mean, Conditional Probability
19 Apr 2016
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Change the sample space to event b. Divided by the probability of the second thing. If independent the probability is p(a|b) = p(a) Countable tends to be whole numbers, ex number of students etc. Mean and variance of discrete random variable. The squared deviations of each value is just the number - the mean. Then you square^2 that and multiply by the px. Standard deviation is the square root of the variance. Conducting an experiment n times independently and observing the number of x times that one of the two outcomes occurs and the probability of success remains the same from trial to trial. Number of successes in n trials is the binomial. If probability of passing is p = . 1 and you"re looking at 4 times. Mean and variance for a binomial random variable. Standard deviation is the square root of ^ False gives the exact probability of x successes in n trials.
