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Line 56:
Line 56: − +
→Weighted averages: fix minor error
One way to do this is to repeat an item or include it more than one time in the calculation of the average.
One way to do this is to repeat an item or include it more than one time in the calculation of the average.
For example, consider the ruler diagram above. Imagine that we hang ''ten'' weights at the 11" mark. Instead of
For example, consider the ruler diagram above. Imagine that we hang ''ten'' weights at the 11" mark. Instead of
:(1 + 9 + 11) / 2 = 7,
:(1 + 9 + 11) / 3 = 7,
it is now
it is now
:(1 + 9 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 11) / 12 = 10
:(1 + 9 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 11) / 12 = 10