Using R to solve following questions: Using the file "PHD. The csv file has the following columns: Column 1. Year: How many years it took the...

school.

Grouping by residency, who had the highest probability

of going to Berkeley?

Probkem III. Continue with the "PHD.csv" dataset. For the following

problems, you must show results from either a plot, a table,

or an aggregate command to back up your answers.

(a) How may subjects were there attending Columbia?

(b) How different was each schools average time to graduate

compared to the overall average?

c) Were there more people who attended Berkeley

and were temporary residents, or who attended

Columbia and were temporary residents (looking at

the absolute magnitude).

(d) If you were told a subject came from Princeton and

was a temporary resident, what would you estimate

their years to graduate to be (based on only summary statistics and plots)?