Probability and Statistics Mean Random Variable

It is a number which describes the spread of the distribution.

The total area under the curve of Normal Distribution is equal to ______ .

Identify whether the experiment involves a discrete or a continuous random variable.

• Discrete Random Variable

• Continuous Random Variable

It is a variable whose values depend on outcomes of a random phenomenon.

• Random Variable

• Discrete Variable

• Continuous Variable

• Independent Variable

Is the following a probability distribution?

• Yes, because all of the probabilities are between 0 and 1 inclusive and the sum of all the probabilities is 1.

• No, all probabilities are not be between 0 and 1 inclusive

• No, the sum of all the probabilities is not 1.

• Yes, because the distribution is symmetric

The table above shows the number of cell phones per household in a small town. Find the mean round to the nearest hundredth.

• 2.80

• 2.93

• 0.10

• 0.14

What is the mean of the probability distribution?

• 4.13

• 5.18

• 5.54

• 6.08

What is the variance of the distribution?

• 8.04

• 8.40

• 9.50

• 9.05

Is the following a probability distribution?

• Yes, because all of the probabilities are between 0 and 1 inclusive and the sum of all the probabilities is 1.

• No, all probabilities are not be between 0 and 1 inclusive

• No, the sum of all the probabilities is not 1.

• Yes, because the distribution is symmetric

Is the following a probability distribution?

• Yes, because all of the probabilities are between 0 and 1 inclusive and the sum of all the probabilities is 1.

• No, all probabilities are not be between 0 and 1 inclusive

• No, the sum of all the probabilities is not 1.

• Yes, because the distribution is symmetric