106
Statistical Graphs and Calculations Chapter 7
The following are the meanings of the above parameters.
a ...... Regression coefficient (slope)
b ...... Regression constant term (intercept)
r ...... Correlation coefficient
kk
kk
k Med-Med Graph
When it is suspected that there are a number of extreme values, a Med-Med graph
can be used in place of the least squares method. This is also a type of linear regres-
sion, but it minimizes the effects of extreme values. It is especially useful in produc-
ing highly reliable linear regression from data that includes irregular fluctuations,
such as seasonal surveys.
2(Med)
4(DRAW)
The following are the meanings of the above parameters.
a ...... Med-Med graph slope
b ...... Med-Med graph intercept
kk
kk
k Quadratic Regression Graph
A quadratic regression graph represents connection of the data points of a scatter
diagram. It actually is a scattering of so many points that are close enough together
to be connected. The formula that represents this is quadratic regression.
3(X^2)
1234
1234
P.99
(G-Type)
P.99
(G-Type)
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