Question: Refer to the tank temperature-efficiency ratio data given in Exercise 1. a. Determine the equation of the estimated regression line. b. Calculate a point estimate

Refer to the tank temperature-efficiency ratio data given in Exercise 1.
a. Determine the equation of the estimated regression line.
b. Calculate a point estimate for true average efficiency ratio when tank temperature is 182.
c. Calculate the values of the residuals from the least squares line for the four observations for which temperature is 182. Why do they not all have the same sign?
d. What proportion of the observed variation in efficiency ratio can be attributed to the simple linear regression relationship between the two variables?

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