User Manual

6-9
u OnData
The Q1, Q3 and Med values for this calculation method are described below.
Q1 = {value of element whose cumulative frequency ratio is greater than 0.25 and nearest to
0.25}
Q3 = {value of element whose cumulative frequency ratio is greater than 0.75 and nearest to
0.75}
The following shows an actual example of the above.
(Number of Elements: 10)
Data Value Frequency
Cumulative
Frequency
Cumulative
Frequency Ratio
1 1 1 1/10 = 0.1
2 1 2 2/10 = 0.2
3 2 4 4/10 = 0.4
4 3 7 7/10 = 0.7
5 1 8 8/10 = 0.8
6 1 9 9/10 = 0.9
7 1 10 10/10 = 1.0
• 3 is the value of whose cumulative frequency ratio is greater than or equal to 0.25 and
nearest to 0.25, so Q1 = 3.
• 5 is the value of whose cumulative frequency ratio is greater than or equal to 0.75 and
nearest to 0.75, so Q3 = 5.
Reference Point (0.25) Reference Point (0.75)
• Med is calculated using the same method as that used when the “Std” is selected for the
“Q1Q3 Type” setting.
• It makes no different whether frequency values are all integers or include decimal fraction
values when “OnData” is selected for the “Q1Q3 Type” setting.
Q1
0.1 0.2 0.4 0.7 0.8 0.9 1.0
Q3
1
2633444 75