Recognizing Probability Distributions

Using the probability distribution, find P(X > 1).

What formula describes the probability distribution?

What is the numerical quantity assigned to the outcome of an experiment usually denoted by an uppercase letter such as X?

• Frequency

• Probability

• Random variable

• Sample

Which of the following is NOT true for any discrete random variable X?

• It can be described by a formula.

• It is the listing of the possible samples and the corresponding mean.

Find the missing value for P(X=5) in the probability ditribution: Number of Toys | Probability 0| 0.03 1| 0.16 2| 0.30 3| 0.23 4| 0.17 5| ?

• 0.11

• 0.21

• 0.01

• 0.31

Consider the following distribution where X = number of mice caught in an apartment in a night:

Mice | Probability

0 | 0.12

1 | 0.20

2 | 0.31

3 | 0.14

4 | 0.16

5 | 0.07

What is the probability of trapping at least three mice?

• 0.14

• 0.37

• 0.23

• 0.16

Consider the following distribution where X = number of mice caught in an apartment in a night:

Mice | Probability

0 | 0.12

1 | 0.20

2 | 0.31

3 | 0.14

4 | 0.16

5 | 0.07

What is the probability of trapping at most two mice?

• 0.14

• 0.37

• 0.23

• 0.63

The table represents the probability of guessing correct on a 5 question true-false quiz.  Find the probability of getting at least 4 questions correct.

• 0.03125

• 0.15625

• 0.3125

• 0.1875

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the probability of getting all 5 questions correct.

• 0.03125

• 0.15625

• 0.3125

• 0.1875

Choose the correct sign

probability of "at least 7"

• P(X>7)

• P(X<7)

• P(X≥7)

• P(X≤7)