Question:
The n candidates for a job have been ranked 1, 2, 3,..., n. Let x = rank of a randomly selected candidate, so that x has pmf:
(this is called the discrete uniform distribution).
Compute E(X) and V(X) using the shortcut formula.
[Hint: The sum of the first n positive integers is , whereas the sum of their squares is
Answer:
or
Step-by-step explanation:
Given
PMF
Required
Determine the E(x) and Var(x)
E(x) is calculated as:
This gives:
From the hint given:
So:
Var(x) is calculated as:
Calculating:
Using the hint given:
So:
So:
Take LCM
Apply difference of two squares
What numbers are you talking about love?
Answer:
A. No, because the preimage are not congruent.
Step-by-step explanation:
If you look, the preimage and the image are not the same size. That means I dilation occurred.
If they were to be congruent, there would have been a rotation, reflection, or translation.
A. No, because the preimage are not congruent.
Answer: 16m
Step-by-step explanation: no problem.
Answer:
its a and b
Step-by-step explanation: