Design a binomial experiment. You will need three things: 1. The trial: it should only have two outcomes, such as “heads or tails,” “would I make it to work on time or not,” or “students who pass or fail Math 2,” etc. You also need to decide how many trials you would do. 2. The theoretical percentage of success for each trial: you may not know this, so give me a good, educated guess. 3. What’s the probability of “x times” happening? Now calculate the mean, the standard deviation, and the probability for one example of “x.” My example is as follows: 1. The trial: Finding a parking spot in Ontario Mills (a mall) right in front of the theater on a Sunday. I’m going there five times. ("Success" means you found a spot right in front of the theater.) 2. The theoretical percentage of success each trial: 20%. (That's my guess of finding a parking spot in front of the theater on any given Sunday.) What’s the percentage of "Success" all 5 times? From Table A-1, n=5 (total trials), p=0.2 (theoretical probability), x=5 (how many times I want to see it happen), the probability is 0.00032—which means that my chance of finding a spot to park in front of the theater on a Sunday all five times is 3/10000.
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Latest answer posted February 24, 2013 at 9:10:28 AM
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