Introduction to Statistics (MAT/SST 115.03 2008S)
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Held: Monday, 28 April 2008
Summary: We consider tests that can be used to determine what samples of two populations reveal about the differences of means between those two populations.
Notes:
Overview:
the two means are the same.
sqrt(s1^2/n1+s2^2/n2)
.
df = (s1^2/n1 + s2^2/n2)^2/((s1^2/n1)^2/(n11) + (s2^2/n2)^2/(n21))
t.test
.
t.test(Sample1,Sample2)
t.test
to compute a confidence interval.
t.test(Sample1,Sample2,conf.level=.##)
pt
.
qt
, but, once again, you need to supply the area
of the curve to the left of that value. For a 95% confidence interval
and 5 degrees of freedom, we would write
qt(.975,df=5)
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Primary:
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[Current Outline]
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[Academic Honesty]
[Instructions]
Groupings:
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[Data]
[Examples]
[Handouts]
[Labs]
[Outlines]
[Projects]
[Readings]
[Solutions]
External Links:
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[SamR's Front Door]
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