Good Morning,

Im working on an assignment question and am having some difficulty trying to work out what I need to do.

I worked out the answer to 4(a) using RStudio however I dont understand the others( b),(c),(d),(e) and (f). I need to put them through RStudio to get an output but am unsure of how to do it and what they mean.

Any guidance regarding what I need to enter into R to get an output and why so I understand would be greatly appreciated.

Here is the question and my answer to part (a):

4. If X is N(12, 1.4 2 ), use R to find: (a). P(X > 13.4) Answer: > pnorm(13.4, 12, 1.4^2) [1] 0.7624747 (b). P(10.5 0.9) (d). P(X 2 + 10 14 | X > 13.4) (f). the 95 th percentile