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Measure of spread: Standard Deviation

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Presentation on theme: "Measure of spread: Standard Deviation"— Presentation transcript:

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

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

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

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

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

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

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

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

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