Assume a binomial probability distribution has p = .60 and n = 200.

Question

c. What is the probability of 100 to 110 successes (to 4 decimals)?

d. What is the probability of 130 or more successes (to 4 decimals)?

Answer 1

c. z = (100-120)/(200sqrt(120*.4)

z = (110-120)/200/sqrt(120*.4))

d. z = (130-120)/200/sqrt((120*.4))

Use Z table