It is not a particularly good book.

]]>No, this book is by Walpole.

]]>Is that the Devore book we were talking about, bobbym?

]]>I am getting for a , 3 / 64 = 0.046875.

and I can't find the answer to it.

Check Probability and Statistics for Engineers and Scientists.

]]>1) Let X denote the reaction time, in seconds, to a certain stimulant and Y denote the

temperature (0 F) at which a certain reaction starts to take place. Suppose that two random

variables X and Y have the joint density:

f(x,y) = 4xy, 0<x<1 , 0<y<1 and 0 elsewhere

Find

a. P(0 ≤ X ≤ ½ and ¼ ≤ Y ≤ ½ )

Here is my solution:

P(0 ≤ X ≤ ½ and ¼ ≤ Y ≤ ½ ) = ∫∫4xy dx dy => 4∫∫xy dx dy

=> 4∫∫ (x^2/2) dy => 4∫ (.25y/2) dy => 4 ∫ (y^2/16) = > 4(.25/16 - .0625/16) => **.046875**

I'm looking for someone to check and see if I got the correct solution since this is my first time doing a problem like this and I can't find the answer to it.

Thanks!

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