Variance and Standard Deviation

Variance and Standard Deviation

By

Variance Steps

3 Steps;

Find Mean

Find distances to mean, square the distances to mean

Find mean of squares of distances​

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Multiple Choice

Finding the what is the first step?

• Find the median

• Find the range

• Find the mean

• Find the Mode

Find the mean

add and divide by how many there are

10, 20, 30, 35, 40, 50, 60

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Multiple Choice

What mean did you get? 10, 20, 30, 35, 40, 50, 60

• 10

• 100

• 30

• 35

Find the distances to the mean

​10, 20, 30, 35, 40, 50, 60

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Square the Distances

Square: multiply by itself

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Multiple Choice

What is 9 squared?

• 3

• 18

• 81

• 72

Find the mean of the distances to the mean

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​The Standard Deviation is the Square root of the variance

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​Squares and

Square roots

2 squared is 4

square root of 4 is 2​

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