Tuesday
September 16, 2014

Homework Help: Math check and question

Posted by Nora 57 on Thursday, June 6, 2013 at 6:03pm.

x is a binomial random variable. (Give your answers correct to three decimal places.)
(a) Calculate the probability of x for: n = 1, x = 0, p = 0.15
P(x) = Correct: Your answer is correct. . (0.85)

(b) Calculate the probability of x for: n = 3, x = 3, p = 0.15
P(x) = Incorrect: Your answer is incorrect. . (0.68)

(c) Calculate the probability of x for: n = 5, x = 0, p = 0.8
P(x) = Correct: Your answer is correct. . (0.00)

(d) Calculate the probability of x for: n = 1, x = 1, p = 0.4
P(x) = Correct: Your answer is correct. . (0.40)

(e) Calculate the probability of x for: n = 3, x = 1, p = 0.45
P(x) = Incorrect: Your answer is incorrect. . (0.45)

(f) Calculate the probability of x for: n = 6, x = 6, p = 0.25
P(x) = (1.50)
I worked these all the same way got three right and three wrong can someone explain to me how???? I multiplied p to x to get answers.

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