Find the indicated 10) 10) The table below describes the smoking habits of a gro

Question

Find the indicated 10) 10) The table below describes the smoking habits of a group of asthma sufferers. Ocasional Regular Heavy Nonsmoker smoker moker smoker Total 419 763 2 557 73 1058 Total 155 If one of the 1058 people is randomly selected, find the probubility that the person is a man heavy smoker ) 0.465 D) 0.504 A) 0,562 1) A sample of 4 d A) 0.2399 t calculators is randomly selected from a group containing 48 that are defective and 20 that have no defects What is the probability that all four of the calculators selected are defective? Round to four decimal places B) 0.0301 C) 40.1610 D) 0.2483 Use the Poisson Distribution to find the indicated probability 12) The number of lightning strikes in a year at the top of a particular mountain has a Poisson 12) distribution with a mean of 39. Find the probability that in a randomly selected year, the number of lightning strikes is 5 A) 0.1979 B) 0.2587 C 0.1522 D) 0.0036 Find the indicated probability 13) A tennis player makes a successfulfirst serve 55% of the time. If she serves 5 times, what is the probability that she gets exactly 3 first serves in? Assume that each serve is independent of the 13) A) 0.166 B) 0.0337 C) 0.276 Dy 0337

Explanation / Answer

10)
P(man or a heavy smoker)
P(A or B) = P(A) +P(B) - P(A and B)
= (501+73-41)/1058
=0.503780
=0.504

D) is correct

11)

probability that all four are defective
= 48*47*46*45/(68*67*66*65)
= 0.23892

A) is correct

12)
P(X = x) = e^(-lambda) * lambda^ x/ x!
P(X = 5)
=e^(-3.9) * 3.9^5 / 5!
= 0.15219

C) 0.1522 is correct

13)
X follow binomial with n = 5 and p = .55
P(X = k) = nCk * p^k * q^(n-k)
P(X = 3) = 5C3 * 0.55^3 * 0.45^2
= 10 * 0.55^3 * 0.45^2
= 0.3369
D) is correct

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