Question 1051829: Find the standard deviation of the binomial random variable.
According to a college survey, 22% of all students work full time. Find the standard deviation for the random variable X, the number of students who work full time in samples of size 16. Round your answer to two decimal places
I used the square root *22*16*.84 but its not right am I using the right formula ?
Answer by rothauserc(4718)   (Show Source):
You can put this solution on YOUR website! The mean of the sample is 0.22, the probability(P) of success in the population
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The standard deviation of the sample is the square root ( (P * (1-P)) / sample size ) = square root ( (0.22 * 0.78) / 16 ) = 0.1036
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The standard deviation of the sample is 0.10
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