Statistics › Section H · Confidence intervals › Topic H.1

Point estimates and good estimators

A point estimate is a single best guess for a population number. This topic builds the vocabulary of estimation - estimators, estimates, and the properties that make some guesses better than others - and shows why no point should ever travel alone.

In this topic

  • From sample to single best guess
  • Estimators and estimates
  • Unbiasedness
  • Efficiency
  • Consistency
  • Maximum likelihood, in brief
  • Worked example: battery lifetimes
  • Worked example: a poll's point and its wobble
  • Common mistakes to avoid
  • Key takeaways

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