You conduct a linear regression to predict wing length in as a function of post-

Question

You conduct a linear regression to predict wing length in as a function of post-hatching age. You find a highly significant, very strong relationship within the range of day 2 to day 13. To determine the feather length at day 16, you plug in 16 as an independent X to predict the corresponding wing length Y.

a. this is appropriate because regression is a predictive relationship

b. This is inappropriate because at day 14 chicks fly away

c. This is inappropriate because the linearity of the relationship is unknown beyond day 13

d. This is a problem that is not suitable for regression.

Explanation / Answer

ANSWER: (a)

This is appropriate because regression is a predictive relationship

EXPLANATION: From the given information, there was highly significant relationship between wing length and post-hatching age. Therfore for the given value of independent variable we can predict the value of dependent variable.

And also the main objective regression analysis is to estimate the value of responce variable by the known value of explanatory variable. And it is a predictive technique.

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