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Assumed Mean Method for Variance
Let:
$$d_i=x_i-A$$
Then:
$$\sigma^2=\frac{\sum f_id_i^2}{N}-\left(\frac{\sum f_id_i}{N}\right)^2$$
Usage
- Simplifies variance calculations when values are large.
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Assumed Mean Method for Variance
Let:
$$d_i=x_i-A$$
Then:
$$\sigma^2=\frac{\sum f_id_i^2}{N}-\left(\frac{\sum f_id_i}{N}\right)^2$$
Usage
- Simplifies variance calculations when values are large.
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