Probability Distributions Introduction

Discrete data is

• countable

• measurable

Is the number of cheeseburgers a fast-food restaurant serves each day discrete or continuous?

• Discrete

• Continuous

Is the height (in cm) of a seedling chosen randomly from a group of plants a discrete random variable?

• Yes

• No

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CCSS.HSS.IC.A.1

Is the number of days that a song stays in the top 10 a discrete random variable?

• Yes

• No

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Is the number of orange Skittles in a bag discrete or continuous data?

• Discrete

• Continuous

All of the probabilities in a probability distribution add up to what?

• 0

• 10

• 1

• .5

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CCSS.7.SP.C.5

Find the missing value for P(X=5) in the probability ditribution:

Number of Toys | Probability

0| 0.03

1| 0.16

2| 0.30

3| 0.23

4| 0.17

5| ?

• 0.11

• 0.21

• 0.01

• 0.31

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CCSS.7.SP.C.5

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Determine which of the following distribution is NOT a probability distribution.

• A

• B

• C

• D

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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.

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CCSS.7.SP.C.5

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the probability all 5 questions correct.

• .03125

• .15625

• .3125

• .1875

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CCSS.7.SP.C.5

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