From the course: Complete Guide to Excel Statistics with Copilot
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Discrete: Binomial distribution
From the course: Complete Guide to Excel Statistics with Copilot
Discrete: Binomial distribution
- [Instructor] When an experiment has only two possible outcomes, the result is what we call a binomial random variable. A coin flip can only result in heads and tails. A patient can either test positive or negative for a disease. These are possible binomial random variables, provided we have n trials with the probability of success we call P. In other words, if we take our coin and flip it four times, n is equal to 4, the number of flips. P is 0.50, the chance of success, which can either be heads or tails in this case. Consider these two problems. First, a town is calling community members for jury duty. These are the folks that might eventually be chosen to serve as members of a jury. Let's say 20 people from the community will be chosen for a jury pool at random. The jury pool is selected from a community that is 55% female. In this situation, n is equal to 20, and P is equal to 0.55 or 55%. What's the probability only five members of the 20-person jury pool will be female? Second…
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