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Course: Statistics and probability?>?Unit 9
Lesson 6: Binomial mean and standard deviation formulas- Mean and variance of Bernoulli distribution example
- Bernoulli distribution mean and variance formulas
- Expected value of a binomial variable
- Variance of a binomial variable
- Finding the mean and standard deviation of a binomial random variable
- Mean and standard deviation of a binomial random variable
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Mean and standard deviation of a binomial random variable
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Problem
Ms. Davis is doing an activity with her statistics students where she gives them a -question multiple choice test, and they know none of the answers. Students need to guess on every question, and each question has possible choices, of which is correct.
What are the mean and standard deviation of the number of questions that each student gets correct?
You may round your answers to the nearest tenth.
You may round your answers to the nearest tenth.
mean:
correctstandard deviation:
correct