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Recent Updates
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Understanding Data

An average of averages can be computed using the weighted mean. The weighted mean can also be used to calculate the mean when certain values are...

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Propositions and their Converses

A proposition is a statement that is true or false. The converse of the proposition ‘if P then Q’ is the proposition ‘if Q then P’.

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Modals

Modals are helping verbs that express different meanings, such as Ability, Permission, Possibility, Necessity, Advice, Requests, Suggestions.

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Future Time Reference

We use Future Time Reference to talk about actions or events that will happen in the future. There are different ways to express future time in...

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