Part $($e$)$

$\frac{0\mathrm{.}0}{3\mathrm{.}0}$ points $($graded$)$

Although we now have a solution, we can do better. Return to looking at your data, which

variables could benefit from a logarithmic transformation?

You should judge whether a variable could benefit by looking at the residuals and $Q-Q$ plots.

When analyzing real world data, you will often be required to make judgement calls like this, as

you will not have the resources for an objective automated search $($consider that there are $2^{15}$

different choices of logarithm transforms in this problem$).$ This question gives partial credit, so

you can earn close to full marks even if you miss one variable.

Mortality

JanTemp

JulyTemp

RelHum

Rain

Educ

Dens

NonWhite

WhiteCollar

Pop

House

Income

$HC$

NOx

$SO2$

Grading Note $($Feb $17)$: $.$ We have regraded everyone to accept "JanTemp" as a correct option,

and also given partial credit.