Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 22RP
Water Quality. In the article “Randomized Stratified Sampling Methodology for Water Quality in Distribution Systems” (Journal of Water Resources Planning and Management, Vol. 130, Issue 4, pp. 330–338), V. Speight et al. proposed the method of stratified sampling to collect water samples for water-quality testing. The following table separates the Durham, North Carolina water distribution system into strata based on distance from the nearest treatment plant.
Distance from treatment center | Stratum size |
Less than 1.5 miles | 1310 |
1.5–less than 3.0 miles | 3166 |
3.0–less than 4.5 miles | 2825 |
4.5–less than 6.0 miles | 1593 |
6.0–less than 7.5 miles | 1350 |
7.5 miles or greater | 1463 |
Use the table to design a procedure for obtaining a stratified sample (with proportional allocation) of 80 water samples from Durham.
Hint: Refer to the remarks about strata
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Consider annual per-capita sales in tobacco (Y) and aggregate tobacco related advertisements (X) in the U.S. (the
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a.
600
Advertisement (X)
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b.
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d.
5000
4000
3000
2000
1000
Y₁ =B₁ + B₂X₁ + u₁
t
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Regression 13069027.5359 13069027.5359
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2487.5635
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Predict the value of tobacco sales based on advertisement outlays equal to 900.
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Ho: B₁: = 0
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Table 2-2 Wafers Classified by Contamination and Location
Number of
Contamination
Particles
Center
Edge
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0.30
0.10
0.40
0.15
0.05
0.20
0.10
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0.15
3
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0.04
0.10
4
0.04
0.01
0.05
5 or more
0.07
0.03
0.10
Totals
0.72
0.28
1.00
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7) Determine P(A/B).
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Chapter 1 Solutions
Introductory Statistics (10th Edition)
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Ch. 1.1 - In Exercises 1.71.12, classify each of the studies...Ch. 1.1 - In Exercises 1.71.12, classify each of the studies...Ch. 1.1 - Thoughts on Evolution. In an article titled Who...Ch. 1.1 - Big-Banks Break-up. A nationwide survey of 1000...Ch. 1.1 - Genocide. The document American Attitudes about...Ch. 1.1 - Vasectomies and Prostate Cancer. Refer to the...Ch. 1.1 - In Exercises 1.171.22, state whether the...Ch. 1.1 - In Exercises 1.171.22, state whether the...Ch. 1.1 - In Exercises 1.171.22, state whether the...Ch. 1.1 - In Exercises 1.171.22, state whether the...Ch. 1.1 - In Exercises 1.171.22, state whether the...Ch. 1.1 - In Exercises 1.171.22, state whether the...Ch. 1.1 - Ballistic Fingerprinting. In an on-line press...Ch. 1.1 - Causes of Death. The National Center for Health...Ch. 1.1 - Medical Testing on Animals. In its Summer 2013...Ch. 1.1 - Lobbying Congress. 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In Exercise 1.49 on page...Ch. 1.3 - Keno. In the game of keno, 20 balls are selected...Ch. 1.3 - Sampling Dorm Residents. Students in the...Ch. 1.3 - Best High Schools. In an issue of Newsweek (Vol....Ch. 1.3 - U.S. House of Representatives. There are 435...Ch. 1.3 - Prob. 76ECh. 1.3 - Prob. 77ECh. 1.3 - In simple random sampling, all samples of a given...Ch. 1.3 - In simple random sampling, it is also true that...Ch. 1.3 - In simple random sampling, it is also true that...Ch. 1.4 - In a designed experiment, a. what are the...Ch. 1.4 - State and explain the significance of the three...Ch. 1.4 - Prob. 83ECh. 1.4 - In this section, we discussed two types of...Ch. 1.4 - In a designed experiment, there is one factor with...Ch. 1.4 - In a designed experiment, there is one factor with...Ch. 1.4 - Prob. 87ECh. 1.4 - In a designed experiment, there are two factors,...Ch. 1.4 - In a designed experiment, there are two factors....Ch. 1.4 - Adverse Effects of Prozac. 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