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Example Question #14 :Least Squares
建议您使用一个计算器atrix arithmetic capability for this question.
Give the equation of the least squares regression line for the following data:
,,,.
Round your coefficients to three decimal digits, if applicable.
Possible Answers:
Correct answer:
Explanation:
Form the matricesand
using the abscissas and ordinates of the four points:
and
The least squares regression line is the line of the equation,
wherecan be found using the equation
.
This can be calculated as follows:
The least squares regression line is the line of the equation
.
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