Lesson 11 · Comparison of Two Data using Whisker Box Plot

Standard Deviation Presentation

Optional MathematicsSubject
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Optional Mathematics, Class 10, Lesson 11

Standard Deviation

Variance · Coefficient of S.D. · Coefficient of Variation

By the end of this lesson you can

📏

Say what standard deviation and variance mean

🧮

Find σ for a short list of values

🌦️

Name four fields where σ is used

⚖️

Use the coefficient of S.D. and C.V. to compare data

Same mean, different spread

🎯Asha
62, 65, 64, 66, 63
Mean 64
Marks close together
VS
🎢Bikash
44, 84, 54, 74, 64
Mean 64
Marks far apart

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Presenter notes: Today we learn how to measure how spread out a set of data is, and how to compare the spread of two different sets.