Stastistics 1

Topics: Hypertension, Blood, Natural selection Pages: 4 (729 words) Published: April 27, 2011
Statistics
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|
| Non-smoker| 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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