Answer:
5
Step-by-step explanation:
3x5=15 those two numbers are always equal to eachother
Answer:
0.070
Step-by-step explanation:
i think
It would take Carl 3.6 minutes and it would take Thomas 1.2 minutes.
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:
21. Line b.
22. Line a.
Step-by-step explanation:
Line b is the most steep because it goes up 5, the rest goes up only 1 and 3
Line a is the least steep because it only goes up 1, while the rest go up more