Statistics
Mean:
Mean is the numerical average of set of data.
Group data
Frequency Table
1
Median:
1.
Order the data
2.
Median is the middle value.
Even set of data
Odd set of data
Median from Grouped data
Example: Calculate Class interval where median lies.
Solution:
(later
used)
Class-interval where median lies:
30 - 40
2
Mode:
Mode is the value that appears with highest frequency.
Mode from frequency table:
Mode=2
Mode from Group data
Modal Class = 90-95
Range:
Estimate for Range = Highest possible value - lowest possible value
Examples
3
Example 2
Range = 105 - 80
(from above mode example)
Stem and Leaf Diagram
Example:1
Example:2
Back-to-Back stem and Leaf
Key:
4
5
6