Example. A researcher estimate the average GPA of all of
the psychology majors at UM.
M M M M M
M M M M M
W W W W W
W W W W W W W W W
Population
Descriptive Statistics
of 100 students.
= 3.40
S = 2.23
_
_
Mean of the
population
Standard deviation
of the population
Mean of the sample
Standard deviation
of the sample
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