Based on the scatterplot of data of the number of hours of training time receive

Question

Based on the scatterplot of data of the number of hours of training time received by production line workers and the time it took (in minutes) for them to trouble shoot their last process problem shown, which of the following statements is true? A. The intercept of the regression line fit to these data will be negative. B. The equal variance assumption is not satisfied C. The slope of the regression line fit to these data will be positive. D. The slope of the regression line fit to these data will be negative.

Explanation / Answer

Answer to the question as below:

a. intercept is clearly positive . Wrong

b. equal variance is satisfied. y - y^ doesn't have much variation, points lie almost on a line.Wrong

c. The slope is negative. Wrong

d. The slope is negative. For increasing x there is decreasing y. Right

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