Question

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

X 24 26 27 32 35 39
P(X) 0.16 0.09 0.18 0.12 0.24 0.21
What is the mean of this discrete random variable? That is, what is E(X), the expected value of X?

Answer 1

\[E(X)=\sum_{}^{}xp(x)\\ =24\times0.16+26\times0.09+27\times0.18+32\times0.12+35\times0.24+39\times0.21\]

Answer 2

so 31.47

Answer 3

Good work! Your answer is correct.

Answer 4

woot

Answer 5

You're welcome :)