Measure of spread: Standard Deviation

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Presentation transcript:

Measure of spread: Standard Deviation Lesson 3 Measure of spread: Standard Deviation

Warm up How do you find the mean of a data set?

Definition Standard Deviation – the average of the distance between individual data values and the mean. Formula:

Example 1 Find the standard deviation of 77, 86, 84, 93, 90

Find the standard deviation of 77, 86, 84, 93, 90 X 2

A3 p 386 # 16 - 19 16. Find the standard deviation of

Reflections How can you determine the standard deviation of a data set? What does the measure of center of a data set indicate?

What does a low standard deviation means and What does a high standard deviation means?