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G.
University of South Carolina; Slide 19 The pvalue for this test is
A.
B.
C.
D. P(tdf=28 > 2.9)
P(tdf=28 < 2.9)
2*P(tdf=28 > 2.9)
2*P(tdf=28 < 2.9) G. Baker, Department of Statistics
G.
University of South Carolina; Slide 20 Suppose the Populations are not
Suppose
Independent
Independent
Examples:
Examples:
– Weights before and after a given diet.
– Reflex time to two different stimuli.
– Measurements obtained by two different
Measurements
instruments.
instruments.
– Comparison of two medical treatments. G. Baker, Department of Statistics
G.
University of South Carolina; Slide 21 Paired Differences
We reduce the two populations down to
one population of differences.
one
We assume that the differences are drawn
from a normal population.
from
We will treat the differences as one
population and estimate their mean and
perform hypothesis tests on their mean.
perform
Why pair measurements?
Why
G. Baker, Department of Statistics
G.
University of South Carolina; Slide 22 Paired D...
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 Fall '13
 Wang
 Statistics, Statistical hypothesis testing, G. Baker

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