Inferential Statistics and Distributions 13-13
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 13 of 36
2.SampTTest (two-sample t test; item 4) tests the equality
of the means of two populations (m1 and m2) based on
independent samples when neither population standard
deviation (s1 or s2) is known. The null hypothesis
H0: m1=m2 is tested against one of the alternatives below.
• Ha: m1ƒm2 (m1:ƒm2)
• Ha: m1<m2 (m1:<m2)
• Ha: m1>m2 (m1:>m2)
In the example:
SAMP1={12.207 16.869 25.05 22.429 8.456 10.589}
SAMP2={11.074 9.686 12.064 9.351 8.182 6.642}
Data Stats
Input:
,,
Calculated results:
,,
Drawn results:
2.SampTTest