When working with interval-ratio data, the optimal strategy for predicting Y while taking X into account would be to________.
A) use the regression line.
B) guess randomly.
C) ignore the slope (b).
D) always predict the Y intercept (a).

Question

Quizplus · Accepted Answer

When working with interval-ratio data, the most effective strategy for predicting Y while taking X into account is to use the regression line. The regression line takes into account both the slope (b) and the Y intercept (a) and provides the most accurate predicted values of Y for a given value of X. Guessing randomly or ignoring the slope (b) or predicting only the Y intercept (a) would not take into account the relationship between X and Y and would provide inaccurate predictions.

When Working with Interval-Ratio Data, the Optimal Strategy for Predicting