Casio fx-9750GII User Manual page 148

Center Point
1 1 2 2
2 + 3 2 + 3
2 2
OnData
The Q1 and Q3 values for this calculation method are described below.
Q1 = {value of element whose cumulative frequency ratio is greater than 1/4 and nearest to
1/4}
Q3 = {value of element whose cumulative frequency ratio is greater than 3/4 and nearest to
3/4}
The following shows an actual example of the above.
(Number of Elements: 10)
Data Value Frequency
1
2
3
4
5
6
7
• 3 is the value of whose cumulative frequency ratio is greater than 1/4 and nearest to 1/4, so
Q1 = 3.
• 5 is the value of whose cumulative frequency ratio is greater than 3/4 and nearest to 3/4, so
Q3 = 5.
Reference Point (0.25)
0.1 0.1 0.2 0.2
1 1 2 2
3 3 4 4 5 5
Median Median
= Q1 = Q1
Cumulative
Frequency
1 1
1 2
2 4
3 7
1 8
1 9
1 10
0.4 0.4
3 3 3 3 4 4
Q1 Q1
6-8
Center Point
6 6 7 7
7 + 8 7 + 8
= Q3 = Q3
2 2
Cumulative
Frequency Ratio
1/10 = 0.1
2/10 = 0.2
4/10 = 0.4
7/10 = 0.7
8/10 = 0.8
9/10 = 0.9
10/10 = 1.0
Reference Point (0.75)
0.7 0.7 0.8 0.8
4 4 4 4 5 5
Q3 Q3
8 8 9 9
0.9 0.9 1.0 1.0
6 6 7 7