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Often want to know if two distributions have different means or variances (NRiC §14.2):
- Student's t-test for significantly different means.
- Find no. of standard errors ~ /N1/2 between two means.
- Compute statistic using nasty formula.
- Small numerical value indicates significant difference.
- F-test for significantly different variances.
- Compute F = Var1/Var2 and plug into nasty formula.
- Small value indicates significant difference.