Question 1

A survey of top executives revealed that 35% of them regularly read Time magazine, 20% read
Newsweek and 40% read Macleans & World Report. Ten percent read both Time and Macleans.
What is the probability that a particular top executive reads either Time or Macleans regularly?
A) 0.85
B) 0.06
C) 1.00
D) 0.65

Accepted Answer

0.65

Question 2

When an experiment is conducted "without replacement",
A) events are independent
B) events are equally likely
C) the experiment can be illustrated with a Venn Diagram
D) the probability of two or more events is computed as a joint probability

Accepted Answer

the probability of two or more events is computed as a joint probability

Question 3

What does the complement rule state?
A) P(A) = P(A) - P(B)
B) P(A) = 1 - P(not A)
C) P(A) = P(A) • P(B)
D) P(A) = P(A)X + P(B)

Accepted Answer

P(A) = 1 - P( A)

Question 4

A group of employees of Unique Services is to be surveyed with respect to a new pension plan. In-
Depth interviews are to be conducted with each employee selected in the sample. The employees
Are classiﬁed as follows. 
What is the probability that the ﬁrst person selected is classiﬁed as a maintenance employee?
A) 0.20
B) 0.50
C) 0.025
D) 1.00
E) None of the choices are correct

Accepted Answer

0.025

Question 5

According to which classiﬁcation or type of probability are the events equally likely?
A) Classical
B) Empirical
C) Subjective
D) Mutually exclusive

Accepted Answer

Classical

Question 6

The result of a particular experiment is called a(n)
A) observation.
B) conditional probability.
C) event.
D) outcome.

Accepted Answer

outcome.

Question 7

The machine has just been ﬁlled with 50 black, 150 white, 100 red and 100 yellow gum balls that
Have been thoroughly mixed. Sue and Jim approached the machine ﬁrst. They both said they
Wanted red gum balls. What is the likelihood they will get their wish?
A) 0.50
B) 0.062
C) 0.33
D) 0.75

Accepted Answer

0.062

Question 8

When an event's probability depends on the likelihood of another event, the probability is
A) conditional probability.
B) empirical probability.
C) joint probability.
D) Mutually exclusive probability.

Accepted Answer

conditional probability.

Question 9

The ﬁrst card selected from a standard 52-card deck was a king. If it is returned to the deck, what is
The probability that a king will be drawn on the second selection?
A) 1/4 or 0.25
B) 1/13 or 0.077
C) 12/13 or 0.923
D) 1/3 or 0.33

Accepted Answer

1/13 or 0.077

Question 10

There are 10 rolls of ﬁlm in a box and 3 are defective. Two rolls are to be selected one after the
Other. What is the probability of selecting a defective roll followed by another defective roll?
A) 1/2 or 0.50
B) 1/4 or 0.25
C) 1/120, or about 0.0083
D) 1/15, or about 0.07

Accepted Answer

1/15, or about 0.07

Question 11

When two or more events can occur concurrently it is called
A) conditional probability.
B) empirical probability.
C) joint probability.
D) a tree diagram.

Accepted Answer

joint probability.

Question 12

Routine physical examinations are conducted annually as part of a health service program for the
Employees. It was discovered that 8% of the employees needed corrective shoes, 15% needed
Major dental work and 3% needed both corrective shoes and major dental work. What is the
Probability that an employee selected at random will need either corrective shoes or major dental
Work?
A) 0.20
B) 0.25
C) 0.50
D) 1.00

Accepted Answer

0.20

Question 13

When are two events mutually exclusive?
A) They overlap on a Venn diagram
B) If one event occurs, then the other cannot
C) Probability of one affects the probability of the other
D) They both happen at the same time

Accepted Answer

If one event occurs, then the other can

Question 14

Which approach to probability is exempliﬁed by the following formula? 
A) Classical approach
B) Empirical approach
C) Subjective approach

Accepted Answer

Empirical approach

Question 15

A board of directors consists of eight men and four women. A four-member search committee is to
Be chosen at random to recommend a new company president. What is the probability that all four
Members of the search committee will be women?
A) 1/120 or 0.00083
B) 1/16 or 0.0625
C) 1/8 or 0.125
D) 1/495 or 0.002

Accepted Answer

1/495 or 0.002

Question 16

A study of 200 stamping ﬁrms revealed these incomes after taxes:  What is the probability that a particular ﬁrm selected has $1 million or more in income after taxes?
A) 0.00
B) 0.25
C) 0.49
D) 0.51

Accepted Answer

0.49

Question 17

Giorgio offers the person who purchases a 250 ml bottle of Allure two free gifts, either an umbrella,
A 30 ml bottle of Midnight, a feminine shaving kit, a raincoat or a pair of rain boots. If you purchased
Allure what is the probability you selected at random an umbrella and a shaving kit in that order?
A) 0.00
B) 1.00
C) 0.05
D) 0.20

Accepted Answer

0.05

Question 18

The National Centre for Health Statistics reported that of every 883 deaths in recent years, 24
Resulted from an automobile accident, 182 from cancer and 333 from heart disease. Using the
Relative frequency approach, what is the probability that a particular death is due to an automobile
Accident?
A) 24/883 or 0.027
B) 539/883 or 0.610
C) 24/333 or 0.072
D) 182/883 or 0.206

Accepted Answer

24/883 or 0.027

Question 19

A lamp manufacturer has developed ﬁve lamp bases and four lampshades that could be used
Together. How many different arrangements of base and shade can be offered?
A) 5
B) 10
C) 15
D) 20

Accepted Answer

20

Question 20

i. The complement rule states that the probability of an event not occurring is equal to one minus
The probability of its occurrence.
ii. If there are two independent events A and B, the probability that A and B will occur is found by
Multiplying the two probabilities. Thus for two events A and B, the special rule of multiplication
Shown symbolically is: P(A and B) = P(A) P(B).
iii. The general rule of multiplication is used to ﬁnd the joint probability that two events will occur.
Symbolically, the joint probability P(A and B) is found by: P(A and B) = P(A) P(B/A).
A) (i), (ii) and (iii) are all correct statements
B) (i) and, (ii) are correct statements but not (iii).
C) (i) and, (iii) are correct statements but not (ii).
D) (ii) and, (iii) are correct statements but not (i).
E) (i), (ii) and (iii) are all false statements.

Accepted Answer

(i), (ii) and (iii) are all correct statements

Quiz 4: Describing Data: Displaying and Exploring Pata

A survey of top executives revealed that 35% of them regularly read Time magazine, 20% read Newsweek and 40% read Macleans & World Report. Ten percent read both Time and Macleans. What is the probability that a particular top executive reads either Time or Macleans regularly?

When an experiment is conducted "without replacement",

What does the complement rule state?

According to which classiﬁcation or type of probability are the events equally likely?

The result of a particular experiment is called a(n)

The machine has just been ﬁlled with 50 black, 150 white, 100 red and 100 yellow gum balls that Have been thoroughly mixed. Sue and Jim approached the machine ﬁrst. They both said they Wanted red gum balls. What is the likelihood they will get their wish?

When an event's probability depends on the likelihood of another event, the probability is

The ﬁrst card selected from a standard 52-card deck was a king. If it is returned to the deck, what is The probability that a king will be drawn on the second selection?

There are 10 rolls of ﬁlm in a box and 3 are defective. Two rolls are to be selected one after the Other. What is the probability of selecting a defective roll followed by another defective roll?

When two or more events can occur concurrently it is called

When are two events mutually exclusive?

Which approach to probability is exempliﬁed by the following formula?

A board of directors consists of eight men and four women. A four-member search committee is to Be chosen at random to recommend a new company president. What is the probability that all four Members of the search committee will be women?

A study of 200 stamping ﬁrms revealed these incomes after taxes: What is the probability that a particular ﬁrm selected has $1 million or more in income after taxes?

The National Centre for Health Statistics reported that of every 883 deaths in recent years, 24 Resulted from an automobile accident, 182 from cancer and 333 from heart disease. Using the Relative frequency approach, what is the probability that a particular death is due to an automobile Accident?

A lamp manufacturer has developed ﬁve lamp bases and four lampshades that could be used Together. How many different arrangements of base and shade can be offered?