Mathematics · Probability and Statistics
If s 2 is the variance of a sample of size N drawn from a normal population with variance σ 2 , then Ns 2 σ 2 has which one of the following distributions with (N-1) degrees of freedom?
- 1Poisson
- 2Student's t
- 3Normal
- 4Chi-square✓
Correct answer
Chi-square
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