1- A discrete random variable can be finite or uncountably infinite.

Group of answer choices

A-True

B_False

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2-The mean temperature in Cancun is 28.5 degrees Centigrade (Celsius). What is the mean temperature in Cancun in Fahrenheit?

Note: F = 9/5C + 32

Group of answer choices

A- 28.5

B- None of these choices is correct.

C-83.3

D-51.3

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3-Mean of (X-Y) = Mean of X - Mean of Y

Group of answer choices

A-True

B-False

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4- Suppose X is a discrete random variable with mean 10 and variance 4, and Y is a discrete random variable with mean 20 and variance 9. We do not know whether X and Y are independent. True/False: We can find the variance of X+Y with only the information we are given.

Group of answer choices

A-True

B-False

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5-

X	1	2	3
p(x)	1/2	1/4	1/4

True/False: The mean of X is 2.

Group of answer choices

A-True

B- False

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6-

If X and Y are independent, then True/False: Variance of (X-Y) = Variance of (Y-X)

Group of answer choices

A-True

B-False

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7-Which of the following is NOT a discrete random variable?

Group of answer choices

A-One that is countably infinite.

B-One that is finite.

C-One that is uncountably infinite.

D-All of these answers are discrete random variables.

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8- Which of the following terms represents "all possible values of a random variable and how often you expect them to occur?"

Group of answer choices

A-data distribution

B-population

C-probability distribution

D- none of these choices is correct

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9-

X	1	2	3
p(x)	.1	.3	.6

What is the probability that X is at least 2?

Group of answer choices

A-0.10

B-0.30

C-0.90

D- 0.40

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10-

True or False?

=

Group of answer choices

A-True

B-False

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