Suppose a simple random sample of size n = 81 is obtained from a population with u = 77 and o = 18.

Suppose a simple random sample of size n = 81 is obtained from a population with u = 77 and o = 18.
a) Describe the sampling distribution of x.
b) What is P (x greater than 80.7)?
c) What is P ( x less than 73)?
d) What is P (74.2 less than x less than 80.7)?

[kermin]

I understand why you did the shortcut at the end, but for all intents and purposes, it's going to confuse the hell out of students.

[madysenl]

okay how are we supposed to find the last part out without the website? :/