

11.4 Standard Deviation
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Mathematics
•
9th Grade
•
Medium
Keegan Kuhlman
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4 Slides • 3 Questions
1
11.4 Standard Deviation

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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!
5
Multiple Choice
Both batters have the same average distance. Which one has a greater standard deviation?
Batter A
Batter B
They have about the same standard deviation
6
Multiple Choice
Which golfer is more likely to hit the ball 320 yards?
Golfer A
Golfer B
7
Multiple Choice
Which sales person is more likely to sell 6 cars in a month?
Sales person A
Sales person B
11.4 Standard Deviation

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