Example

Estimate E(X) and E(Y) for the data given in Example 4. We have seen that x -2 0 2 3

Therefore,

= (—2)(0.27) + (0)(0.12) + (2)(0.26) + (3)(0.35) = 1.03

APPENDIX A: A REVIEW OF SOME STATISTICAL CONCEPTS 879

EXAMPLE 11 (Continued)

The expected value of a continuous rv is defined as

The only difference between this case and the expected value of a discrete rv is that we replace the summation symbol by the integral symbol.

Was this article helpful?

0 0
Rules Of The Rich And Wealthy

Rules Of The Rich And Wealthy

Learning About The Rules Of The Rich And Wealthy Can Have Amazing Benefits For Your Life And Success. Discover the hidden rules and beat the rich at their own game. The general population has a love / hate kinship with riches. They resent those who have it, but spend their total lives attempting to get it for themselves. The reason an immense majority of individuals never accumulate a substantial savings is because they don't comprehend the nature of money or how it works.

Get My Free Ebook


Post a comment