Dear Omar
Your t.test is telling that the 2 groups are not different. Now it is not clear
if you want to compute the CI for the difference or for each group. If the
former, then the outputs provides you with that information.
ItÂ’d be clearer if you provide the full syntax of your t.test. For
You may find these links helpful for the introduction to the t-test and the
interpretation of the t-test results:
http://www.tufts.edu/~gdallal/LHSP.HTM
See: Student's t Test for Independent Samples
http://www.itl.nist.gov/div898/handbook/eda/section3/eda353.htm
Timur
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Timur Shtatland, Ph.D.
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From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
project.org] On Behalf Of Omar Bahy Badreddin
Sent: Wednesday, October 22, 2008 11:37 PM
To: r-help@r-project.org
Subject: [R] Interpretation of t.test results
I have run a t.test in R, and received these results:
Two Sample t-test
data
I have run a t.test in R, and received these results:
Two Sample t-test
data: rsa and umple
t = 0.9819, df = 10, p-value = 0.3493
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
-76.1541 196.1541
sample estimates:
mean of x mean of y
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