Solved: In Exercise 5.10, we proved that is a valid joint

Chapter 5, Problem 54E

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QUESTION:

In Exercise 5.10, we proved that

                           \(f\left(y_{1}, y_{2}\right)=\left\{\begin{array}{ll}

1, & 0 \leq y_{1} \leq 2,0 \leq y_{2} \leq 1,2 y_{2} \leq y_{1}, \\

0, & \text { elsewhere }

\end{array}\right.

\)

is a valid joint probability density function for \(Y_{1}\), the amount of pollutant per sample collected above the stack without the cleaning device, and \(Y_{2}\), the amount collected above the stack with the cleaner. Are the amounts of pollutants per sample collected with and without the cleaning device independent?

Equation Transcription:

Text Transcription:

f(y_1,y_2)={_0, elsewhere ^1, 0</=y_1</=2,0</=y_2</=1,2y_2</=y_1,

Y_1

Y_2

Questions & Answers

QUESTION:

In Exercise 5.10, we proved that

                           \(f\left(y_{1}, y_{2}\right)=\left\{\begin{array}{ll}

1, & 0 \leq y_{1} \leq 2,0 \leq y_{2} \leq 1,2 y_{2} \leq y_{1}, \\

0, & \text { elsewhere }

\end{array}\right.

\)

is a valid joint probability density function for \(Y_{1}\), the amount of pollutant per sample collected above the stack without the cleaning device, and \(Y_{2}\), the amount collected above the stack with the cleaner. Are the amounts of pollutants per sample collected with and without the cleaning device independent?

Equation Transcription:

Text Transcription:

f(y_1,y_2)={_0, elsewhere ^1, 0</=y_1</=2,0</=y_2</=1,2y_2</=y_1,

Y_1

Y_2

ANSWER:

Answer:

Step 1 of 1:

We have given the joint probability density function.

Is a valid joint probability density function for  the amount of pollutant per sample collected above the stack without the cleaning device, and for  the amount collected above the stack with the cleaner.

Are the amounts of pollutants per sample collected with and without the cleaning device independent?

If  are continuous random variables with joint density function

and marginal density functions   respectively, then

are independent if and only if

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