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It is a result of the Central Limit Theorem.

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Q: Why is the variance of a distrubtion of means smaller than the original popluation variance?
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The sample variance is always smaller than the true value of the population variance is always larger than the true value of the population variance could be smaller equal to or?

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Can the Variance ever be smaller than standard deviation?

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What causes a DM Price Variance?

There are a number of reasons for causinf DM Price Variance. Adverse Price Variance 1) Demand > Supply (Low Supply, High Demand result in price to be material purchase to be more costly) 2) Change to a higher grade material quality. 3) Purchases made from oversea, exchange rate incurred 4) Purchases made in smaller quantity As for favourable DM price variance, explanation will be opposite of the above given.


What is the effect of transformer impedance on regulation?

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