A true/false test has 100 questions.Using the normal approximation to the binomial distribution, what is the probability of getting 55 or more correct by just guessing?
A)p(X 55)
B)p(X 55.5)
C)p(X 54.5)
D)none of the above

Question

A true/false test has 100 questions.Using the normal approximation to the binomial distribution, what is the probability of getting 55 or more correct by just guessing?
A)p(X > 55)
B)p(X > 55.5)
C)p(X > 54.5)
D)none of the above

Quizplus · Accepted Answer

The normal approximation to the binomial distribution uses a continuity correction. For P(X ≥ 55), we use P(X > 54.5) to account for this correction.

A True/false Test Has 100 Questions