$2.$ Please use the gss$2018$ or issp$2009\_$ea data sets uploaded to Moodle for the following exercises. Just choose one of these two datasets for the following exercises.

$3.$ Please do the following exercises using R and interpret the results:

A$.$ Choose one nominal$-$level variable, one ordinal$-$level variable, and one interval$-$ratio$-$level variable from the dataset of your choice and report appropriate descriptive statistics $($including central tendency and dispersion$)$ for each variable.

i$.$ Choose your variables carefully. The variables selected can be used to answer Problems E ~ H$.$ Make sure one of them should be considered the independent variable with reasonable rationale.

ii$.$ Please make sure that you handle the missing values properly. For this and the following exercises, you may need to recode the variables $($e$.$g$.,$ recode an ordinal$-$level variable to an interval$-$ratio$-$level variable or vice versa$).$