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11.4 Standard Deviation

11.4 Standard Deviation

Assessment

Presentation

•

Mathematics

•

9th Grade

•

Medium

Created by

Keegan Kuhlman

Used 118+ times

FREE Resource

4 Slides • 3 Questions

1

11.4 Standard Deviation

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2

What is Standard Deviation?

  • Standard deviation tells us how much the data varies from the average

  • A small standard deviation means the data is very close to the mean

  • A large standard deviation means the data can be very far away from the mean

3

Sometimes the mean doesn't give us the whole story

  • My age is 30, my husband is 29, and my daughter is 2

  • The mean age of people in my house is 20.3

  • Does that accurately represent the ages of people in my house?

  • What would you guess about the standard deviation?

4

Fun fact!

  • This is the formula for calculating standard deviation...

  • ...but...

  • ...You don't have to calculate it!


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5

Multiple Choice

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Both batters have the same average distance. Which one has a greater standard deviation?

1

Batter A

2

Batter B

3

They have about the same standard deviation

6

Multiple Choice

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Which golfer is more likely to hit the ball 320 yards?

1

Golfer A

2

Golfer B

7

Multiple Choice

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Which sales person is more likely to sell 6 cars in a month?

1

Sales person A

2

Sales person B

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11.4 Standard Deviation

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