The data listed in the following table are from a study by Benignus and others (1981). Blood and brain levels
a. Provide a scatter diagram, with BLOODTOL as the response and PPM_TOLU as the predictor.
b. Compute least-squares estimates of the straight-line regression coefficients. Plot the line on the scatter diagram.
c. Repeat part (a) for the natural logarithms LN_BLDTL and LN_PPMTL, the respective natural logarithms of BLOODTOL and PPM_TOLU.
d. Repeat part (b) for the natural logarithms.
e. Which transformation leads to the best representation of the data? Note in your comments the validity of the regression assumptions.
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