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# Refer to Exercises 5.6, 5.24, and 5.50. Suppose that a radioactive particle is randomly ISBN: 9780495110811 47

## Solution for problem 5.74 Chapter 5

Mathematical Statistics with Applications | 7th Edition

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Problem 5.74

Refer to Exercises 5.6, 5.24, and 5.50. Suppose that a radioactive particle is randomly located in a square with sides of unit length. A reasonable model for the joint density function for Y1 and Y2 is f (y1, y2) = \$ 1, 0 y1 1, 0 y2 1, 0, elsewhere. a What is E(Y1 Y2)? b What is E(Y1Y2)? c What is E(Y 2 1 + Y 2 2 )? d What is V(Y1Y2)?

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STAT 2004 WEEK 14 REVIEW: T-test  Use a T-test when sigma is unknown.  Use cutoffs to test, not p-values. HYPOTHESIS TESTING RATIONALE  Make an assumption. Is what you observed likely or unlikely  Compare what you observe to what you expect. CHI-SQUARE TEST  How different is what we observed...

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##### ISBN: 9780495110811

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