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According to a survey, 20.8% of the lawyers and judges in the United States in 1992...

According to a survey, 20.8% of the lawyers and judges in the United States in 1992 were women. For a sample of 200 judges find the mean, variance and standard deviation.

Math   Statistics-And-Probability   
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Answer #1

Solution:

Given that,

P = 0.208

1 - P = 0.792

n = 200

Mean = = n*P = 200 * 0.208 = 41.6

Variance = =n*p*(1-p) = 200*0.208*0.792 = 32.9472

Standard deviation = =n*p*(1-p) = 32.9472 = 5.7400

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