A standard six-sided die is rolled 12 times. What is the standard deviation of the number...
A standard six-sided die is rolled 12 times. What is the standard deviation of the number of times a 2, 3, or 4 will be rolled? Round your answer to two decimal places.
Homework Answers
This will be a binomial distribution with parameters:
n = 12, p = P(2, 3 or 4) = 3/6 = 0.5
Hence,
Standard deviation = 
= 1.73
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