Mathematics, 29.04.2021 15:40 apowers1760

A discrete random variable X has the following probability mass function P(X = x) = {

2kx x = 2, 4, 6
k(x + 2) x = 8
0 otherwise

where k is a constant
a. Show that k =
1
34

b. Find the exact value of P(4 < x ≤ 8)
c. Find the exact value of P(2 < x < 4)
d. What is the expected value of the random variable X?
e. What is the variance of the random variable X?
f. Determine Var(5 − 3X)

Answers: 1

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 20:00, rina62

The diagram shows corresponding lengths in two similar figures. find the area of the smaller figure. a. 14.4 yd2 b. 24 yd2 c. 26.4 yd2 d. 28

Answers: 1

continue

Mathematics, 21.06.2019 20:30, ellie55991

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

Answers: 3

continue

Mathematics, 21.06.2019 21:00, alissa64

How to simply and write the answer n a whole number

Answers: 1

continue

Mathematics, 21.06.2019 23:00, grettelyesenia

Find the dimensions of the circle. area = 64π in.² r= in.

Answers: 1

continue

You know the right answer?

A discrete random variable X has the following probability mass function P(X = x) = {

...