ESS210B
Prof. Jin-Yi Yu
Paired Data (One-Sample) t-Test
qPaired Data: where observations come
in natural pairs.
For
example:
A doctor might measure the effect of a drug by measuring
the physiological state of patients before and after applying
the drug. Each patient in this study has two observations, and
the observations are paired with each other. To determine the
drug’s effectiveness, the doctor looks at the difference
between the before and the after reading.
qPaired-data test is a one-sample
t-test
To
test whether or not there is a significant difference, we use
one-sample t-test. It is because we are essentially looking at
one
sample of data – the sample of paired difference.