Chapter 13: Inferential Statistics and Distributions 361
2-SampFTest
2-SampFTest2-SampFTest
2-SampFTest
2-SampÜTest (two-sample Ü-test; item E) computes an Ü-test to compare two normal
population standard deviations (s1 and s2). The population means and standard
deviations are all unknown. 2-SampÜTest, which uses the ratio of sample variances
Sx12/Sx22, tests the null hypothesis H0:s1=s2 against one of the alternatives below.
•H
a: s1ƒs2 (s1:ƒs2)
•H
a: s1<s2 (s1:<s2)
•H
a: s1>s2 (s1:>s2)
Calculated
results:
Drawn results: