Applied Statistics in Business and Economics
Applied Statistics in Business and Economics
5th Edition
ISBN: 9781259329050
Author: DOANE
Publisher: MCG
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Chapter 15.3, Problem 9SE

a.

To determine

Make a bar chart and describe it.

b.

To determine

Calculate the expected frequencies for each class.

c.

To determine

Conduct the chi-square test for a uniform distribution. Check whether, the sample contradicts the assumption that readership is uniformly distributed among these six age groups or not at 0.05 level of significance.

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Please could you explain why 0.5 was added to each upper limpit of the intervals.Thanks
28. (a) Under what conditions do we say that two random variables X and Y are independent? (b) Demonstrate that if X and Y are independent, then it follows that E(XY) = E(X)E(Y); (e) Show by a counter example that the converse of (ii) is not necessarily true.
1. Let X and Y be random variables and suppose that A = F. Prove that Z XI(A)+YI(A) is a random variable.

Chapter 15 Solutions

Applied Statistics in Business and Economics

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