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Graph alt text 1

A graph entitled ‘Two normal distributions’ consisting of two overlapping bell-shaped curves, with a horizontal (x) axis of probability from 0 to 100% and an unlabelled vertical (y) axis. The first (solid line) bell curve indicates a normal distribution with mean of 50 and standard deviation of 15. As such, it is symmetrical and centred at 50. The second (dashed line) bell curve indicates a normal distribution with mean of 50 and standard deviation of 10. This curve is also symmetrical and centred at 50; however, its central peak is lower and its ‘shoulders’ are wider.

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Last updated September 25, 2013



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