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Normal
distribution plot
(N.D.)
Box plot
(Box)
Modified box
plot
(MBox)
Chapter 8: Statistics & Regression Calculations
A normal distribution curve of sample(x)
The x-axis is in the range of Xmin to
Xmax.
A box plot graph of sample (x)
A. The minimum value (xmin) of the
sample (x)
B. The first quartile (Q1)
C. Median (Med) of the sample (x)
D. The third quartile (Q3)
E. The maximum value (xmax) of the sample (x)
A modified box plot graph of sample (x)
A. The minimum value (xmin) of the
sample (x)
B. The tip of extension which is
defined by (Q3
C. The first quartile (Q1)
D. Median (Med) of the sample (x)
E. The third quartile (Q3)
F. The tip of extension which is defined by (Q3
G. The maximum value (xmax) of the sample (x)
• Statistical data on the outside of the extension are indicated by
points, selectable from three types of points.
• The length of the extension from the box is determined by Q1
and Q3.
–
Q1) x 1.5
A
B
C
D
A B
C D E
F
–
Q1) x 1.5
E
G
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