Measures of central tendency
(Formuls)
Averages
of 5 type:-
· Arithmetic mean
· Median
· Mode
· Geometric mean
· Harmonic mean
Arithmetic mean:
Series:
=
=
=
Distribution:
=
Median:-
Series:
Equal number
=
th term +
th term
th term +th term
Odd
number
=
th term
th term
distribution:
=L+
Mode:
Distribution:
=L+
(OR)
=L+
emperial relation between mean,median,mode
emperial relation between mean,median,mode
Mean-mode=
3(mean-median)
-z= 3(-Me)
Mode
= 3 median-2 mean
Z=
3 Me -2
Geometric mean:
Set
of observation
=
Series:
=antilog
Distribution:
=
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