Question

In: Statistics and Probability

Vehicles entering an intersection from the east are equally likely to turn left, turn right, or proceed straight ahead.

 

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 =

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