APPLICATION OF SUPERVISED LEARNING
LINEAR REGRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which is TRUE?I. Random scatter in the residuals indicates a linear model.II. If two variables are very strongly associated, then the correlation between them will be near 1 or-1.III. Changing the units of measurement for x or y changes the correlation coefficient.
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I only
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II only
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I and II only
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I, II and III
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Explanation:
Detailed explanation-1: -A residual plot shows the difference between the observed response and the fitted response values. The ideal residual plot, called the null residual plot, shows a random scatter of points forming an approximately constant width band around the identity line.
Detailed explanation-2: -The correct answer is d. The correlation value between the given two variables denotes the strength and direction of the linear relationship between them. Its value always lies between-1 and 1.
There is 1 question to complete.