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For the marks 2, 4, 4, 4, 5, 5, 7, 9, find the mean and the spread (the standard deviation of the…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
For the marks , find the mean and the spread (the standard deviation of the whole data).
Need a reminder? The key ideaShow
pstdev measures how far the data is from its mean.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, compare your working with the solution.
- Mean. The sum is , and there are values: .
- Spread.
statistics.pstdevgives . It tells how far the values are from the mean on average: bigger means more spread out.
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