Question

(a) In 1918 the lean was 2.9071 meters. (The coded value is 71.) Using the least-squares equation for the years 1975 to 1987, calculate a predicted value for the lean in 1918. (Note that you must use the coded value 18 for year.)

Answer 1

The predicted value of the year 18 is 107

Explanation:

create a scatter plot for year and mean variables.

(i have done that with Microsoft excel check the attachment from 1-3)

Least square regression equation:

y = 9.3187x - 61.121

Predicted value of the lean 18

y = 9.3187 x (18) - 61.121

y = 107

The predicted value of the year 18 is 107