Concept explainers
To write equation of regression.
Answer to Problem 4.19EP
Explanation of Solution
Given information:
Formula used:
The equation of regression y= a + bx,
Where,
y is the dependent variable (that’s the variable that goes on the yaxis)
And x is the independent variable (i.e. it is plotted on the x axis), b is the slope of the line and a is the y-intercept.
n is total number of variables.
Calculation:
Table
From table
n=5
Using formula to calculate, a
On solving,
Further solving,
So,
a= 4.3
Using formula to calculate, b
On solving,
On solving,
On solving,
b= 722.8
Substituting values of a and b in the regression equation to obtain regression equation
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