identify variable on data

2.Using the file “wages” (http://lib.stat.cmu.edu/datasets/CPS_85_Wages ) or
Edit [Moderator]: Link removed


Please:
a.Identify (by visualization and by analytics) which variable: education, experience or age
impacts the most the variable wage.
b.Male workers have higher salary than female counterparts. Do you agree or disagree,
please provide supporting analysis and comments.
c.Select the random sample of 5 records by EDUCATION.
3.Please explain, population, sample size and what are the circumstances that sampling is in
inevitable