-4/3
Rate of change is same as slope
The correct answer should be 9
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
Answer:
6 23/3
6+7 2/3
13 2/3
Step-by-step explanation:
Like and follow
Answer:
Step-by-step explanation:
a triangle is 1/2 of the base x height. so the area of 4 triangles and the surface area of the base square is the total surface area.