Question

Find the probability that the number of u.s adults who have very little confidence in newspapers is (a)exactly 5 (b) AT LEAST 6 (c) LESS THAN FOUR

core: 0 of 1 pt 7of11(6complete) ▼ HW Score: 54.55%, 6 of 11 2.19 Question Help n newspapers. You randomly select 10 U.S. aduts. Find the probability that the number of U.S. adults whe have very litle conidence in newepapers is (a) exactly five, (b) at least six, and (e)le han four PS(Round to tree decimal places as needed)

Answer 1

This will be a binomial distribution with parameters:

n = 10, p = 0.57

Hence,

a) P(X = 5)

= binom.dist(5, 10, 0.57, True) [Excel Formula]

= 0.223

b) P(At least six)

= 1 - P(Less than or equal to 5)

= 1 - binom.dist(5, 10, 0.57, True)

= 0.556

c) P(Less than four)

= binom.dist(3, 10, 0.57, True)

= 0.081