Measures of Central Tendency

Arithmetic Mean:

Ungrouped Data

where d = x -A

where 

Grouped Data

where d = x -A

where 

Weighted Mean: 

If we have n values of x 

with respective weights

then weghted mean is caluculated as

Geometric Mean :

Ungrouped Data

Geometric mean of n positive values is 

GM = 

Grouped Data

GM = 

Harmonic Mean :

Ungrouped Data

Grouped Data

Median : 

Ungrouped Data

Data is arranged generally in ascending order and the median is 

Median = = Value of 

Grouped Data

Median = =

Mode :

Ungrouped Data

Mode is found by inspection from the data. The most repeated value in the data is MODE.

Grouped Data

Quartiles :

Ungrouped Data

Grouped Data

Deciles :

Ungrouped Data

Grouped Data

Percentiles :

Ungrouped Data

Grouped Data

Computer Coaching Classes

 Professor Zahoor Ahmad

from

F.G. Sir Syed College,

The Mall, Rawalpindi

is taking

Computer Science Classes

for Matric, O/A Level, ICS

C/C++ Language

at

Sir Syed Educational Academy

1/5, Lane # 3, Tulsa Road,

Lalazar, Rawalpindi Cantt.

Call: 0300 5100 970