Unbiased Estimates of Population Parameters
Calculating unbiased estimates for the population mean and variance from a given sample. Students distinguish between sample variance and unbiased estimate of population variance.
About This Topic
Calculating unbiased estimates for the population mean and variance from a given sample. Students distinguish between sample variance and unbiased estimate of population variance.
Key Questions
- What makes an estimator 'unbiased'?
- How do we calculate the unbiased estimate of the population variance?
- Why do we divide by (n-1) instead of n when estimating population variance?
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