Population SD=20, n=100. Standard error of x-bar?

Mutually exclusive A,B: P(A)=.25, P(B)=.35. Find P(A or B).

mean=40, SD=8, n=16. z for x-bar=44?

Find the median: 4, 6, 8, 11, 15.

X=1,2,3 with probabilities .3,.4,.3. Find E(X).

Find the mode: 3, 5, 5, 7, 9.

A company needs high-speed, low-latency storage access between servers. Which network type should they use?

Which type of hypervisor runs directly on hardware without an OS?

Given that I have the following code, what code would I have to add in order to be able to increment the variable z?      let x: i32 = 5; let mut y: i32 = 6;      let z: &mut i32 = &mut y;

Which component failure is likely if a monitor displays a very faint image?