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1. Measures
of
Variability

2. variability
Variability is the measure of the
spread of a data set.
The commonly used measures of
variability are range, variance and
standard deviation.

3. Range

4. Quartile deviation

6. VARIANCE:

VARIANCE: is the mean or average of the
squares of the deviation of each measurement
from the mean.

10. Standard deviation
Standard deviation is the square
root of the variance of a set of
scores.

12. THE END!!!
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Thank You for
Listening.