Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Textbook Question
Chapter 7.2, Problem 55E
For Exercises 7.55–7.57, refer to Equations (7.1) and (7.2) on pages 315 and 316, respectively.
7.55 Suppose that a simple random sample is taken without replacement from a finite population of size N.
- a. Show mathematically that Equations (7.1) and (7.2) are identical for
samples of size 1. - b. Explain in words why part (a) is true.
- c. Without doing any computations, determine σx for samples of size N without replacement. Explain your reasoning.
- d. Use Equation (7.1) to verify your answer in part (c).
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Suppose that a simple random sample is taken without replacement from a finite population of size N.
a. Show mathematically that Equations (7.1) and (7.2) are identical for samples of size 1.
b. Explain in words why part (a) is true.
c. Without doing any computations, determine σ x for samples of size N without replacement. Explain your reasoning.
d. Use Equation (7.1) to verify your answer in part (c).
. Consider the following information.
P(Z) = 0.73
P(A) = 0.25
P(Z and A) = 0.15
Part A: Determine P(Z|A).
Part B: Determine P(A|Z).
part a is identifying the claim and stating H0 & Ha.
Chapter 7 Solutions
Introductory Statistics (10th Edition)
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