Discrete Random Variables Do Now

Is this a probability distribution?

• No, the sum of p(x) does not equal 1.

• Yes, all p(x) are between 0 and 1.

• No, all p(x) are not between 0 and 1.

• Yes, the sum p(x) is 1.

Find the mean (expected value) of the probability distribution. (HINT: use the Delta Math calculator or your graphing calculator)

• 85

• 83.2

• 87.1

• 84.4

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

Rotating a spinner that has 4 equally divided parts: blue, green, yellow, and red

• Discrete Random Variable

• Continuous Random Variable

Tags

CCSS.HSS.MD.A.1

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

Collecting data about the mileage per liter of a certain brand and model of a car

• Discrete Random Variable

• Continuous Random Variable

A random variable is defined by a rule that assigns a _______________ to every outcome in a sample space.

• number

• letter

• Event

• probability

Tags

CCSS.HSS.MD.A.1

A fair coin is flipped three times. What is the probability of seeing heads exactly once?

• 3/8

• 1/8

• 1/2

• 1/6

Tags

CCSS.HSS.CP.B.9

A fair coin is flipped three times. What is the probability of seeing heads at least once?

• 7/8

• 1/8

• 6/7

• 1/6

Tags

CCSS.HSS.CP.A.1

CCSS.HSS.CP.B.7