The document defines and provides examples for mean, median, mode, and range. It explains that mean is the sum of all values divided by the number of values. Median is the middle value in an ordered data set. Mode is the value that occurs most frequently. Range is the difference between the highest and lowest values.

1. Mean/Average, Median,
Mode and Range
By
Abdul Ghaffar

2. Mean/Average
Average/Mean = Sum of Values/Number of Values
Average/Mean = (x1+x2+x3+…+xn)/n
Example Find the Average of 10, 20, 30 and 40
25 is Average

3. Median
the median is also a type of average, which is used to find the centre
value.
Odd Number of Observations Even Number of Observations
Or
2, 4, 6, 8, 10
6 is Median
where n is the number of observations
Or
2, 4, 6, 8, 10, 12
6+8/2 = 14/2
7 is Median

4. Mode
Mode refers to the value that is repeatedly occurring in a given
set
Example : Find the mode of the given data set: 3, 3, 6, 9, 15,
15, 15, 27, 27, 37, 48.
Solution:
In the following list of numbers,
3, 3, 6, 9, 15, 15, 15, 27, 27, 37, 48
15 is the mode since it is appearing more number of times in
the set compared to other numbers.

5. Range
The range is calculated by subtracting the lowest value from the highest value.
Range Formula
R = H – L
•R = range
•H = highest value
•L = lowest value
Consider following given dataset 2,2,4,4, 4, 6,7,7,8, 8, 8, 9 ,9, 9, 9, 9. You
are required to calculate the Range for this sample.
Solution:
•Maximum value = 9
•Minimum value = 2
Range = 9 – 2
Range = 7

6. Thank you