Assume binomial probability distribution

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Reference no: EM131164562

Assume a binomial probability distribution with n = 40 and p = .55. Compute the following:

a. The mean and standard deviation of the random variable. (Round your answer to 2 decimal places.)

Mean 22 Standard deviation 3.15

b. The probability that X is 25 or greater. (Round your answer to 4 decimal places.)

Probability 0.1711

c. The probability that X is 15 or less. (Round your answer to 4 decimal places.)

Probability 0.0132

d. The probability that X is between 15 and 25 inclusive. (Round your answer to 4 decimal places.)

Probability 0.8157

The mean and standard deviation is right according to the answer check, but somehow when i use the number to calculate the rest of b,c,d; all of them are wrong in the end. Please explain as much details as possible.

Reference no: EM131164562

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