Question 1
Approximate the following binomial probabilities by the use of normal approximation.
a. | P(x < 12, n = 50, p = 0.3) |
b. | P(12 < x < 18, n = 50, p = 0.3) |
Question 2
Approximate the following binomial probabilities by the use of normal approximation. Twenty percent of students who finish high school do not go to college. What is the probability that in a sample of 80 high school students
a. | exactly 10 will not go to college? |
b. | 70 or more will go to college? |
c. | fourteen or fewer will not go to college? |