Stastistics 1
Quiz 2
Prof. Fierimonte
Name Shana Hicks .5
MULTIPLE CHOICE
Find the indicated probability.

1) The table below describes the smoking habits of a group of asthma sufferers. 1)   Light Heavy
 Nonsmoker Smoker Smoker Total
Men 431 44 41 516
Women 378 37 48 463
Total 809 81 89 979
If two different people are randomly selected from the 979 subjects, find the probability that they are both heavy smokers.
A) 0.0001262 B) 0.001754 C) 0.008264 D) 0.008180

2) A IRS auditor randomly selects 3 tax returns from 50 returns of which 15 contain errors. 2) What is the probability that she selects none of those containing errors?
A) 0.343 B) 0.0232 C) 0.3339 D) 0.027
3) In a homicide case 6 different witnesses picked the same man from a line up. 
The line up contained 5 men. If the identification were made by random guesses, find 3) the probability that all 6 witnesses would pick the same person.
A) 1.2 B) 0.0001286 C) 0.000064 D) 0.00032
4) In one town, 37% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability that they are both Democrats.
A) 0.310 B) 0.096 C) 0.093 D) 0.620
5) A class consists of 39 women and 56 men. If a student is randomly selected, what is the probability that the student is a woman?
A) 39  B) 39  C) 56   D) 1
 56   95   95    95 6) A bag contains 4 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag what is the probability that it is blue?
A) 1  B) 1  C) 1   D) 3
 11   3   7    14
Estimate the probability of the event.
7) Of 1003 people who came...
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