Class 10 Optional Mathematics | Mean Deviation

Optional Mathematics · Class 10 · Statistics

Mean Deviation

From the mean · From the median · Coefficients

By the end of this lesson you can

📏

Explain what mean deviation measures

🧮

Find MD from the mean of grouped data

📊

Find MD from the median of grouped data

⚖️

Use the coefficient to compare two data sets

🎯Sita

Marks: 48, 50, 52

Mean: 50

Average distance: about 1.33

🎲Hari

Marks: 30, 50, 70

Mean: 50

Average distance: about 13.33

The notes are free to read in full.

Presenter notes: Today we measure not where the data is centred, but how spread out it is around that centre.