glittr's answer to glittr's Junior College 1 H2 Maths Singapore question.
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is method 2 correct ?
Date Posted:
5 years ago
Yes, perfectly logical.
From the formula
xbar = ∑(x-c) / n + c
= ∑x / n - ∑c / n + c
= ∑x / n - c + c
= ∑x / n
Your working and the formula's lead to the same result.
It's just that the formula saves you time and the steps.
From the formula
xbar = ∑(x-c) / n + c
= ∑x / n - ∑c / n + c
= ∑x / n - c + c
= ∑x / n
Your working and the formula's lead to the same result.
It's just that the formula saves you time and the steps.
thanks . appreciate loads
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