3. In linear regression, residual plots are uscful for (circle one): (a) spottin

Question

3. In linear regression, residual plots are uscful for (circle one): (a) spotting a nonlinear relationship between the response (y) and predictors (x,..., k). (b) computing predicted values of the response variable (y) (c) examining all pairwise correlations between predictors (ri,. .. , rk). (d) computing the typica aount by which an observation deviates from the least squares line/hyperplane 4. Suppose forest researchers are estimating a single population mean of tree diameters in a certain is normal. They measured diameters of arca under the assumption that population distribution a sample of trees and found the sample mean Z-30.5 and 95% confidence interval (29.5. 31.5). Assuming that in the list below you have one and only one 99% confidence interval for the population mean diameter calculated from the same sample, circle this 99% confidence meral (a) (29.7, 31.3) (b) (26, 28) (c) (30.7, 33.3) (d) (29.2, 31.8) e) (31.5, 34.5) (f) (95, 99)

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SOlution

3) option (a)

spotting a non linear relationship between response and predictors

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