Types of Random Variables

Multiple Choice

When flipping three coins, what is the probability of getting a result of 2 heads?

• $$\frac{1}{8}$$

• $$\frac{2}{8}$$

• $$\frac{3}{8}$$

• $$\frac{4}{8}$$

Multiple Choice

What is P(X < 2) = ?

• $$\frac{1}{8}$$

• $$\frac{3}{8}$$

• $$\frac{4}{8}$$

• $$\frac{5}{8}$$

• $$\frac{7}{8}$$

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Fill in the Blanks

What Apgar scores are typical? To find out, researchers recorded the Apgar scores of more than 2 million newborn babies in a single year. Imagine selecting one of these newborns at random. (That’s our chance process.) Define the random variable X = Apgar score of a randomly selected newborn baby. The table gives the probability distribution of X.

Using the table find P(X = 3) = ?

Multiple Choice

Imagine selecting one of these newborns at random. (That’s our chance process.) Define the random variable X = Apgar score of a randomly selected newborn baby. The table gives the probability distribution of X.

Doctor's decided that an APGAR score of 7 or higher is indicative of a healthy baby. What is the probability that a randomly selected baby is healthy?

• 0.908

• 0.809

• 0.099

• 0.946

Multiple Choice

Discrete or Continuous?

The length, in inches of a randomly selected student's wingspan.

• Discrete

• Continuous

Multiple Choice

Discrete or Continuous?

The number of homework assignments a randomly selected student completed this nine weeks

• Discrete

• Continuous

Multiple Choice

Discrete or Continuous?

The number of touchdowns scored by the football team this year.

• Discrete

• Continuous

Multiple Choice

Discrete or Continuous?

The amount of air pressure in a randomly selected tire in the school parking lot.

• Discrete

• Continuous

Pages 384 - 385

#1 - 3, 6, 9, 13, 15

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​Some text here about the topic of discussion.

Homework