Statistics 4.4

# Statistics 4.4 - their answers are guesses. a. Find the...

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4-4 Mean, Variance, and Standard Deviation for Binomial Distributions Objectives : Students will be able to: Calculate the mean, variance, and standard deviation for a binomial distribution. For Binomial Distributions Mean np μ = Variance 2 npq σ = Standard Deviation npq = Example Several students are unprepared for a surprise true/false test with 10 questions, and all of
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Unformatted text preview: their answers are guesses. a. Find the mean and standard deviation for the number of correct answers for such students. b. Would it be unusual for a student to pass by guessing at least 7 correct answers? Why or why not?...
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## This note was uploaded on 04/08/2008 for the course MAT 143 taught by Professor Stone during the Spring '07 term at North Shore Community College.

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