Inferential Statistics and Distributions 13-23
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 23 of 36
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={ 7 L41817L3L5 1 10 11 L2}
SAMP5={ L112L1L33
L552
L11 L1L3}
Data Stats
Input:
,,
Calculated results:
,,
Drawn results:
2-SampÜTest