Random Variable Mean

It is a numerical quantity that is assigned to the outcome of an experiment.

• random variable

• variable

• probability

• probability distribution

Identify the value that should be placed in the question mark. Note: Remember your answer in each item so that you can use your time wisely.

• 0.3

• 0.4

• 0.5

• 0.6

Identify the value that should be placed in the question mark. Note: Remember your answer in each item so that you can use your time wisely.

• 0.3

• 0.4

• 0.5

• 0.6

Identify the value that should be placed in the question mark.

Note: Remember your answer in each item so that you can use your time wisely.

• 1.00

• 1.70

• 10

• none

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

What is the expected number of orders per week?

• 44.50 orders

• 45.23 orders

• 44.61 orders

• Not here

The mean of the sum or difference of two random variables is __________________.

• the sum or difference of their respective means

• found by adding or subtracting the original means and then dividing by two

Given the probability model in the table below, what is the expected value of the random variable?
  X        50          20        5
P(X)     0.1         0.3      0.6

• 14

• 4.67

• 5

• 7.5

Suppose you pay $1.00 to roll a fair die with the understanding you will get $3.00 back rolling a 4 or a 2, and nothing otherwise.  What is the expected amount you win?

• $0.00

• -$1.00

• $1.00

• $3.00