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Author Question: In a family with 4 children, the number of children with blue eyes is a binomial random variable X ... (Read 293 times)

DyllonKazuo

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on: Jul 24, 2018
In a family with 4 children, the number of children with blue eyes is a binomial random variable X with n = 4 and p = .20. What is the variance for the number of children with blue eyes, V(X)?

Question 2

Many people now-a-days use e-mail to communicate with family and friends and as a primary source of communication at their job. Is there a difference between the use of e-mail for men with a college education and those without? A survey in a large city reveals that out of 230 males with a college degree, 212 use e-mail more than twice a day. Out of the 150 without a college education, 122 use e-mail more than twice a day. What is the estimate for the difference between the proportions of men with and without a college degree who use e-mail often?


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jojobee318

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Reply #1 on: Jul 24, 2018
Answer to Question 1

0.64

Answer to Question 2

0.1084


DyllonKazuo

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Reply 2 on: Jul 24, 2018
Excellent

yeungji

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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