STA 202/ STA201
Principles of Statistics for
Business
Lecture 2
,
, Chapter 3
Describing Data :
NUMERICAL MEASURES
Measures of Central Location
Ungrouped Data
, Types of Statistical Measures
1.Measures of Central Location:
The purpose of a measure of location is to pinpoint the center of a
distribution of data. It shows the central value of the data.
(What is the value that all data concentrated around it?)
2.Measures of variation (Dispersion):
Often called the variation or the spread.
It measures to what extent the data is different from each other
3. Measures of Position
There are other ways of describing the variation or spread in a set of
data. The purpose of a measure of position is to determine the location
of values that divide a set of observations into equal parts.
These measures include quartiles, deciles, and percentiles.
Principles of Statistics for
Business
Lecture 2
,
, Chapter 3
Describing Data :
NUMERICAL MEASURES
Measures of Central Location
Ungrouped Data
, Types of Statistical Measures
1.Measures of Central Location:
The purpose of a measure of location is to pinpoint the center of a
distribution of data. It shows the central value of the data.
(What is the value that all data concentrated around it?)
2.Measures of variation (Dispersion):
Often called the variation or the spread.
It measures to what extent the data is different from each other
3. Measures of Position
There are other ways of describing the variation or spread in a set of
data. The purpose of a measure of position is to determine the location
of values that divide a set of observations into equal parts.
These measures include quartiles, deciles, and percentiles.
