Basic Statistics > Significant Digits

*Significant digits* refers to **how many important or interesting digits **there are in a number. For example:

- 221 = 3 sig. digits
- 2212 = 4 sig. digits
- 2211.1 = 5 sig. digits
- 0.0022 = 2 sig. digits. We aren’t ever interested in leading zeros.

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