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KNOWLED
GEWORKERS
FABIHA BUSHRA
Roll- 124
SKEWNESS MOMENTS KURTOSIS
FAHIMUN NESSA
ORTHI
Roll- 103
SKEWNE
SS
Skewness is asymmetry in a statistical
distribution, in which the curve appears
distorted or skewed either to the left or
to the right.
TUSHAR AHMED
Roll- 149
SKEWED
DISTRIBUTION
SYMMRTRICAL
DISTRIBUTION
MEAN= MEDIAN=
MODE
POSITIVE SKEWED
DISTRIBUTION
MEAN> MEDIAN>
MODE
NEGATIVE SKEWED
DISTRIBUTION
MEAN< MEDIAN<
MODE
SALMA AKTER
Roll- 19
MESURES OF
SKEWNESS
ABSOLUTE MEASURE OF
SKEWNESS
SKP= Mean- Mode
KARL PEARSON’S COEFFICIENT OF
SKEWNESS
SKP= Mean- Mode/Standard
deviation
SAFIA ZERIN
BADHON
Roll- 82
MEASURES OF
SKEWNESS
BOWLEY’S COEFFICEINT OF
SKEWNESS
SKP= Q3+Q1-2 Median/Q3-
Q1
KELLY’S COEFFICEINT OF
SKEWNESS
SKP= P90-2P50+P10/P90-
P10
or
SKP= D9-2D5+D1/D9-D1
RUBAIYAT ALAM
Roll- 97
MOMENTS
Moments is a familiar mechanical
term for the measure of a force
with reference to its tendency to
produce rotation.
MOHAMMAD SADMAN
SAKIB
Roll- 67
MESURES OF
MOMENTSFOR UNGROUPED DATA
The rth moment of a variable X about the arithmetic mean X’ is
given by:
µr=1/N (X – X’)r
The rth moment of a variable X about any arbitrary point A is given
by:
µ’r=1/N (X – A)r
MESURES OF
MOMENTS
FOR GROUPED DATA
𝜇r=1/N 𝑓(X – X’)r
&
𝜇 ’r=1/N 𝑓(X – A)r
TOWFIQ AHMED
Roll- 91
KURTOSIS
 In statistics, Kurtosis is the degree of
flatness or peakedness in the region of
mode of a frequency curve.
 measured relative to the “PEAKEDNESS”
of the normal curve. Measures by
coefficient of Kurtosis computed as
k= 𝑖=1
𝑛
𝑋𝑖−𝜇 4
𝑁𝜎4 − 3
NUSRAT JAHAN
Roll- 58
“PEAKEDNESS”
OF THE NORMAL
CURVELEPTOKUR
TIC
MESOKURTI
C
PLATYKURT
IC
SHAMIM SARKER
Roll- 214
MESURES OF
KURTOSIS
Kurtosis is measured by 𝛽2 or its derivativeΥ2
𝛽2 =
𝜇4
𝜇2
& 𝛾2 = 𝛽2 − 3
THANK YOU
QUESTIONS?
KNOWLEDGE WORKERS | SECTION- A

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Skewness,Moments & kurtosis