Testing Differences in Population Variances. QSCI 381 – Lecture 42 (Larson and Farber, Sect 10.3). Recap – Testing Means. We used different tests when comparing means depending on whether we could assume that the population variances for the two populations were the same.
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Testing Differences in Population Variances
QSCI 381 – Lecture 42
(Larson and Farber, Sect 10.3)
is called an .
d.f.N=5; d.f.D=15; =0.05
30 fish are sampled from a Marine Reserve and a fished area. Test the claim that the lengths in the Reserve are more variable than those in the fished area (assume =0.05). The data are:
where FL is the left-tailed critical F-value and FR is the right-tailed critical F-value (based on probabilities of /2).