2. At the end of the module, the students will be able to know the
following:
The computation and interpretation for measures of Central
Tendency
Computation and interpreattaions for measures of
Variability
3. MEASURES OF CENTRAL
TENDENCY
Mean- the most
common measure of
center and is alsoknown
as the “ arithmetic
average ”.
4. MEASURES OF CENTRAL TENDENCY
Median – it is the point Mode – refers to the
that divides the scores in scores that occurred
a distribution in two most in the distribution.
equal parts
5. Measures of Variability
This is used to describe the spread out of the scores in a
distribution that is above or below the measures of central
tendency.
There are three commonly measures of variability:
The range
The quartile deviation
And the standard deviation
6. Three commonly measures of variability:
Range – the difference between the highest score and
lowest score in the data set.
Quartile Deviation – The half of the difference between
the third quartile and the first quartile.
Standard Deviation – the most important and useful
measure of variation, it is the square root of the variance.
