Sunday
April 20, 2014

Homework Help: Math

Posted by Traxx on Wednesday, April 27, 2011 at 1:20pm.

Let X and Y equal the respective numbers of hours a randomly selected child watches movies or cartoons on TV during a certain month. From experience, it is known that E(X) = 30, E(Y) = 50, Var(X) = 52, Var(Y) = 64, and Cov(X, Y)= 14. Twenty-five children are selected at random. Let Z equal the total number of hours these 25 children watch TV movies or cartoons in the next month. Approximate P(1970 < Z < 2090)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

math - it is estimated that in an average lifetime a person watches about 105,...
English - Native speakers - Hello! Is it correct to say He watches sport on TV ...
Statistics - Letís suppose a randomly selected sample of 75 American teenagers ...
statistics - 6. According to the records of Enersource, an electric company ...
math - 2) In a certain instant lottery game, the chances of a win stated as "3 ...
English - 1. He watches TV in the night. 2. He watches TV at night. (Are both ...
math - The quantity demanded each month of the Sicard wristwatch is related to ...
math - The quantity demanded each month of the Sicard wristwatch is related to ...
statistics - From past experience it is felt that the random variable, X, the ...
English Expressions - People in their forties watch TV the least. Who watchs TV ...

Search
Members