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AP Stats Random Variables Practice

Mathematics

12th Grade

CCSS covered

Used 55+ times

AP Stats Random Variables Practice
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12 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.2

CCSS.HSS.MD.B.5

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Is your expected value always going to be what happens in real life?

yes
no

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.2

CCSS.HSS.MD.B.5

CCSS.HSS.MD.A.4

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following is not a random variable?

The heights of randomly-selected buildings in New York City.
The suit of a card randomly-selected from a 52-card deck.
The number of children in randomly-selected households in the United States.
The amount of money won (or lost) by the next person to walk out of a casino in Las Vegas.

Tags

CCSS.HSS.CP.A.1

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

A small store keeps track of the number X of customers that make a purchase during the first hour that the store is open each day.  Based on the records, X has the following probability distribution.
The mean number of customers that make a purchase during the first hour that the store is open is:
   

2.0
2.5
2.9
3

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.2

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

A small store keeps track of the number X of customers that make a purchase during the first hour that the store is open each day.  Based on the records, X has the following probability distribution.
The standard deviation of the number of customers that make a purchase during the first hour that the store is open is

0.2
1.4
2.0
3.0

Tags

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.3

CCSS.HSS.ID.A.4

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school.What is the probability that exactly 2 of the first 20 blood donors have Type B blood? 

0.316
0.282
0.001
Not here

Tags

CCSS.HSS.CP.B.9

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Barry Bonds has a career batting average of .298.  What is the probability that he will get on base 6 times in 10 at bats?

3.58%
5.46%
22.67%
100%

Tags

CCSS.HSS.CP.B.9

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