问题如下:
a. Calculate Cook’s Distance for the last data point. Use built-in regression functions in Excel to assist as needed, such as LINEST.
选项:
解释:
Following the methodology of the first example:
Completing the table:
Y1 is the estimate using the entire data set
Y2 is the estimate using the first nine observations
So the Cook’s distance for the last data point is
为什么K=2?