TI-83 Plus Inferential Statistics and Distributions 414
2.SampÜTest
2.SampÜTest (two-sample Û-test; item D) computes an Û-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.
• Ha: s1ƒs2 (s1:ƒs2)
• Ha: s1<s2 (s1:<s2)
• Ha: s1>s2 (s1:>s2)
In the example:
SAMP4={ 7L41817L3L5 110 11L2}
SAMP5={ L112L1L33
L552
L11L1L3}
Data Stats
Input:
,,