In: Statistics and Probability
Vehicles entering an intersection from the east are equally likely to turn left, turn right, or proceed straight ahead. If 70 vehicles enter this intersection from the east, use technology and the normal approximation to the binomial distribution to find the exact and approximate probabilities of the following. (Round your answers to four decimal places.)
(a)
26 or fewer turn right
exact probability =
approximate probability =
(b)
at least two-thirds of those in the sample turn
exact probability =
approximate probability =