statistic exam finals

Which statement best describes probability?

c. A numerical measure of how likely an event is to occur 

Which value cannot represent a probability?

d. 1.2 

An event with probability 0 is considered: 

d. impossible

An event with probability 1 is said to be: 

d. certain

Which assumption is required for classical probability? 

c. All outcomes are equally likely

Probability is best interpreted as:

c. a long-run relative frequency

If P(A) = 0.65, which statement is correct? 

d. Event A is more likely to occur than not

Which statement best describes probability?

A guarantee that an event will

occur

A measure of randomness only

c.A numerical measure of how likely an event is to occur

A ratio greater than 1

Which value cannot represent a probability?

a. 0

1

0.35

1.2

An event with probability 0 is considered:

a. certain

unlikely

equally likely

impossible

An event with probability 1 is said to be:

unlikely

random

impossible

certain

Which assumption is required for classical probability?

Events must be independent

Outcomes must change over time

All outcomes are equally likely

Events must be mutually exclusive

Probability is best interpreted as:

experimental data only

an absolute prediction

a long-run relative frequency

guesswork

If P(A) = 0.65, which statement is correct?

Event A is unlikely

Event A is impossible

Event A is certain

Event A is more likely to occur than not

Which event is most suitable for classical probability?

a. Rain tomorrow

Stock prices rising

Rolling a fair die

Exam scores

The sample space of an experiment is:

the set of favorable outcomes

the set of all possible outcomes

the most likely outcome

the complement

If an experiment has 10 equally likely outcomes and 3 are favorable, the probability of success is:

a. 3/10

7/10

1/3

10/3

Which probability statement is ALWAYS true?

P(A) = P(A′)

P(A) > 1

P(A) + P(A′) = 1

P(A) − P(A′) = 1

If P(A) = 0.48, then P(A′) equals:

0.48

0.52

1.48

−0.48

Which rule is used when choices are made in sequence?

a. Addition Rule

Combination Rule

Permutation Rule

Fundamental Counting Principle

A restaurant offers 4 appetizers and 5 main dishes. How many meal choices are possible?

a. 9

20

25

45

A code consists of a letter followed by two digits. How many codes are possible if repetition is allowed?

a. 260

2600

520

1000

Tossing three coins produces how many possible outcomes?

6

8

9

12

Which situation uses the Addition Rule instead of multiplication?

a. Choosing a shirt and pants

Rolling two dice

Choosing chicken or fish

Creating passwords

A student chooses one book from 5 math books or 3 science books. How many choices are there?

a. 2

8

15