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1.Which of the following statements is not true about probability?

a.A probability of zero means that an event will not happen, a probability of one means that an event is certain to happen.

b.Probability is used to measure how often random events occur.

c.Probabilities are always numbers between 0 and 1 inclusive.

d.All of the above are true statements

2.If 20 babies are born, how often are there 8 or less male babies?   Assume that the gender of a baby is a random event.  Which of the following experiments would not simulate this situation?

a.Flip a coin twenty times.  Designate a head to mean “female” and a tail to mean “male”.

b.Roll a die twenty times.  Designate a 1, 2, or 3 to mean “female” and a 4, 5, or 6 to mean “male”.

c.Choose the first twenty digits from a row in the random number table.  Designate odd numbers to mean “female” and even numbers to mean “male”.

d.All of the above will simulate the gender of twenty babies.

3.Is the following an example of theoretical probability or empirical probability?  A card player declares that there is a one in thirteen chance that the next card pulled from a well-shuffled, full deck will be a queen. 

a. Theoretical

b. Empirical

4.Is the following an example of theoretical probability or empirical probability?  A homeowner notes that five out of seven days the newspaper arrives before 5 pm.  He concludes that the probability that the newspaper will arrive before 5 pm tomorrow is about 71%.

a.Theoretical

b.Empirical

5.The National Center for Health Statistics has found that there is a 0.41% chance that an American citizen will die from falling.  What is the probability that you will not die from a fall?  Round to the nearest hundredth of a percent)

a.99.59%

b.93.31%

c.59.00%

d.Can’t be determined with the given information.

 

6.The Venn diagram below depicts gender and occupation of a sample of adults.  Which region on the Venn diagram represents the event “The individual is a male nurse”?

a.Region 1

b.Region 2

c.Region 3

d.Region 4

Use the following table to answer questions (7) -(13).  A random sample of college students was asked to respond to a survey about how they spend their free time on weekends.  One question, summarized in the table below, asked each respondent to choose the one activity that they are most likely to participate in on a Saturday morning.  The activity choices were homework, housework, outside employment, recreation, or other.

HomeworkHouseworkOutside EmploymentRecreationOtherTotal

Male29152023996

Female181726394104

Total4732466213200

 

7.If one student is randomly chosen from the group, what is the probability that the student is female?

a.0.50

b.0.48

c.0.52

d.None of the above

8.

If one student is randomly chosen from the group, what is the probability that the student chose “outside employment” as their most likely activity on a Saturday morning?

a.0.13

b.0.23

c.0.43

d.None of the above

9.If one student is randomly chosen from the group, what is the probability that the student is female and chose “outside employment” as their most likely activity on a Saturday morning?

a.0.13

b.0.23

c.0.43

d.None of the above

Chapter 5 Test A       5-3

10.If one student is randomly chosen from the group, what is the probability that the student chose “homework” or “housework” as their most likely activity on a Saturday morning?

a.0.395

b.0.145

c.0.075

d.None of the above

 

 

 

 

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