Statistics › Section G · The central limit theorem › Topic G.2
The central limit theorem for sums
Will the elevator overload? Can this month's receipts cover the costs? Some questions are about totals, not averages - and a sample sum is as random as a sample mean. The central limit theorem governs both.
In this topic
- Totals are random too
- The sum's centre and spread
- The z-formula for sums
- Where sums matter
- Worked example: the elevator
- Worked example: a month of receipts
- Landmarks for sums
- Sums and averages, one theory
- Common mistakes to avoid
- Key takeaways
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