MEASUREMENTS OF ASYMMETRY AND AIMING
Called shape measures since they allow us to compare the shape of these graphic representations.
Targeting
It is said measure of the degree of acuty of a normal distribuition, that is, measures with a diferent relationship to the distribution.
AIMING MEASUREMENT
it is denoted by:
g2
Thet are those that analyze whether a frequency distribution is more pointed or less when comparing it as normal distribution, thah is, with the same measurement and variance.
is defined for
variable x
Y= x-B
Parameters
REFERENCES
Subtopic
CHARACTERISTICS OF AIMING MEASUREMENTS
Measure
Ungrouped data
frequency tables
data grouped into intervals
Guys
leptocurtica
mesocutica
plasticurtica
ASYMMETRY
It is this measuere of the shape of a distribution n
that allows us to describe the data in which it tends to identify characteristics of the data distribution.
Asymmetry measures
To measure the asymmetry of a distribution, diferent coeficients are used, in which the so- called asymmetry coeficient can be obtained.
It is denoted by g1
It is defined as a central moment of order 3 and standard deviation cubed.
characteristics of asymmetry
The values of the variables are more frenquent, that is, they are higher, and if the distributions has a tail to the left, this asymmetry is negative.
When the most common vallues of the distribution has a tail to the left, his asymmetry is negative.