The following table shows the probability distribution for a discrete random variable.

X 18 22 27 30 31 35
P(X) 0.12 0.13 0.25 0.16 0.14 0.20

What is the mean of this discrete random variable. That is, what is E(X), the expected value of X?

Your answer will be a decimal number. Express this number exactly.

Question

The following table shows the probability distribution for a discrete random variable.

X	18	22	27	30	31	35
P(X)	0.12	0.13	0.25	0.16	0.14	0.20

What is the mean of this discrete random variable. That is, what is E(X), the expected value of X?

Your answer will be a decimal number. Express this number exactly.

dan815 · Answer

hey

dan815 · Answer

have u ever tried to calculate the average of your tests, when they are weighted differently

dan815 · Answer

this is the same principal

anonymous · Answer

is there a formula i could follow?

zarkon · Answer

take your list of numbers and multiply straight down...then add across.