Oluwaseun

This page lists questions and answers that were posted by visitors named Oluwaseun.

Questions

The following questions were asked by visitors named Oluwaseun.

At 27°c, 300cm3 of gas sample exerts a pressure of 720mmHg. How many molecules are present in the gas sample? thanks

Answers

The following answers were posted by visitors named Oluwaseun.

E[X]=1 V[X]=1/4 E[Y]=3 V[Y]=1

The random variables X and Y have a joint PDF of the form fX,Y(x,y)=c⋅exp{−1/2(4x2−8x+y2−6y+13)} E[X]=1 V[X]=1/4 E[Y]=3 V[Y]=1

Let X and Y be two normal random variables, with means 0 and 3 , respectively, and variances 1 and 16 , respectively. Find the following, using the standard normal table. Express your answers to an accuracy of 3 decimal places. 1. P(X>−1)=0.841 2. P(X≤−2)...

Just a slight workings but give headache