An Experiment Was Performed on a Certain Metal to Determine $\sum X$

question 33

Essay

An experiment was performed on a certain metal to determine if the strength is a function of heating time.Results based on 10 metal sheets are given below.Use the simple linear regression model. $\sum X$ = 30 $\sum X ^ { 2 }$ = 104 $\sum Y$ = 40 $\sum Y ^ { 2 }$ = 178 $\sum X Y$ = 134
-Find the estimated y intercept and slope and write the equation of the least squares regression line.

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