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Question - Understanding a linear regression model. Consider a linear regression model with μy = 50.3 + 1.7x and standard deviation σ = 4.2.

(a) What is the slope of the population regression line?

(b) Explain clearly what this slope says about the change in the mean of y for a change in x.

(c) What is the subpopulation mean when x = 7?

(d) Between what two values would approximately 95% of the observed responses y fall when x = 7?

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