Question
Consider the binomial random variable x with n = 30 and p = 0.85.
(a) Find the mean. (Give your answer correct to one decimal place.)
25.5 .
(b) Find the standard deviation. (Give your answer correct to two decimal places.) 30.85
(a) Find the mean. (Give your answer correct to one decimal place.)
25.5 .
(b) Find the standard deviation. (Give your answer correct to two decimal places.) 30.85
Answers
Mean is correct.
Standard deviation = sqrt(npq))
sqrt(30* .85 *.15) = 1.96
Thank you I left out the .15 and sqrt. I have a lot of problems with the standard deviation and not sure why. Is there a simple formula to use????
Related Questions
Consider a binomial random variable where the number of trials is 12 and the probability of success...
The random variable X has a binomial distribution with the probability of a success being 0.2 and th...
1.Let 𝑋 and 𝑌 be two binomial random variables:
a.If 𝑋 and 𝑌 are independent, then 𝑋+𝑌 is...
Let 𝑋 be a discrete Poisson random variable with parameter 𝜆. Given 𝑋=𝑥, let 𝑌 be the binomial rando...