MEASUREMENTS OF ASYMMETRY AND AIMING
characteristics of asymmetry
When the most common vallues of the distribution has a tail to the left, his asymmetry is negative.
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.
Asymmetry measures
It is defined as a central moment of order 3 and standard deviation cubed.
It is denoted by g1
To measure the asymmetry of a distribution, diferent coeficients are used, in which the so- called asymmetry coeficient can be obtained.
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.
CHARACTERISTICS OF AIMING MEASUREMENTS
Guys
plasticurtica
mesocutica
leptocurtica
Measure
data grouped into intervals
frequency tables
Ungrouped data
REFERENCES
Subtopic
AIMING MEASUREMENT
Parameters
g2(x)=0
g2 (x)<0
the distribution is platykurtic, flatter than normal
distribution is mesokurtic, that is, the same as the
if g2 (x) the distribution is leptokurtic
is defined for
Y= x-B
variable x
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.
it is denoted by:
g2
Targeting
It is said measure of the degree of acuty of a normal distribuition, that is, measures with a diferent relationship to the distribution.
Called shape measures since they allow us to compare the shape of these graphic representations.
