Question

It is believed that 90 percent of the population of all students consider statistics to be an exciting subject. Suppose we randomly and independently selected 20 students from the population. Find the probability that at least 15 of these students consider statistics to be an exciting subject Select one:

a. 1−[P(0)+...+P(15)] 1−[P(0)+...+P(15)]

b. 1−[P(0)+...+P(14)] 1−[P(0)+...+P(14)]

c. P(0)+...+P(14) P(0)+...+P(14)

d. P(0)+...+P(15)

Answer 1

Let "X" be the students who consider statistics to be an exciting subject.

Use the excel formula "=BINOM.DIST.RANGE(Trail,probability,Number_1,Number_2)" to find the probability.

Here, Trail(n)=20, probability(p)=0.90, number_1=0, number_2=14

=BINOM.DIST.RANGE(20,0.90,0,14)	0.0113

The probability that at least 15 of these students consider statistics to be an exciting subject is .