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2. Lesson 2: Standard Deviation
Measures of Variability:
• Range -
• Standard Deviation
­ a more complex measure of variability that measures
the distance that each piece of data is from the mean
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3. Example 1: The following are the test scores of a group of
Grade 12 students from High School A.
• Calculate the standard deviation for this data set.
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4. Calculating Standard Deviation: Summary
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5. Example 2: The following are the test scores of a group of
Grade 12 students from High School B.
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6. Comparing the 2 High Schools:
High School High School
A B
Mean (X)
Range
Standard Deviation
(Sx)
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8. Assignment # 2
(Statistics Handbook)
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