NETMaths

Is this true?

A mixture of two distributions is a linear combination of the variables

No — it is false.

The counterexample

This one comes with the Notes pack.

See pricing

85 counterexamples are free — including most of the ones Part C leans on hardest.

The kind of mistake this is

Moments and tails

A moment assumed to exist, or tail behaviour assumed to be tame.

Drill statements like this

Others that fail the same way

From ProbabilityRandom variables, distributions, moments, MGF

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