Math 119 Probability Review Set 3 Worksheet (Page 7 of 9) in pdf

Math 119 Probability Review Set 3 Worksheet Page 7

14. Assume that a procedure yields a binomial probability model with a

trial repeated n = 5 times. Suppose the probability of success on a

single trial is p = 0.47. Then X counts the number of successes among

5 trials. Describe the distribution (probability model) by ﬁlling out

the table below. Round calculations to three decimal places.

x P (X = x)

15. College campuses are graying! According to a recent article, one

in four college students is age 30 or older. Many of these students

are women updating their job skills. Assume that the 25% ﬁgure

is accurate, that your college is representative of colleges at large,

and that you sample n = 200 students, recording X, the number of

students age 30 or older. What are the mean and standard deviation

of X?

15.

Math 119 Probability Review Set 3 Worksheet Page 7