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.
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).