Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Chapter 1, Problem 8RP
Identify and explain the significance of the three basic principles of experimental design.
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Example 4 (Part 2) We can use Statkey to take 50 different random samples of size 20 each, find the mean of
each sample, and compute a confidence interval for each one. The graph of the sampling distribution of the means
is on the left below, and that of the 50 confidence intervals is on the right.
1. What does each dot on the left hand dotplot represent?
StatKey Sampling Distribution for a Mean
Percent with Internet Access (Countries) ▾
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Choose samples of size n =
20
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Generate 1 Sample
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Sampling Dotplot of Mean
Left Tail Two-Tail Right Tail
60
50
40
40
30
20
20
10
samples = 50
mean = 41.626
std. error = 5.089
:
.:
:
::
0
25
30
35
40
45
50
55
60
41.626
Data Plots
Confidence Intervals
95%->
Confidence Intervals
Coverage
48/50 = 96%
20
40
60
80
2. Circle the confidence intervals that failed to capture the true mean.
3. Circle the sample means that produced those…
Example 4 (Part 1) One of the datasets in the Lock book
contains information about 215 countries of the world. One
of the variables is the percentage of people in the country
who have access to the internet. We have data for 203 of
those countries. The plot on the right shows a dotplot of
the data.
1. What are the cases?
Population
n = 203, mean = 43.024
median = 43.5, stdev = 29.259
20
2. What does each dot on the dotplot represent?
15
10
5
20
40
43.024
60
80
3. What type of data is do we collect from the cases, quantitative or categorical?
Let x be a random variable that represents the percentage of successful free throws a professional basketball player makes in a season. Let y be a random variable that represents the percentage of successful field goals a professional basketball player makes in a season. A random sample of n =6 professional basketball players gave the following information.
x
63
79
70
80
84
87
y
46
49
45
55
57
58
Find Se. Round your answer to three decimal places.
Chapter 1 Solutions
Introductory Statistics (10th Edition)
Ch. 1.1 - Define the following terms: a. Population b....Ch. 1.1 - What are the two major types of statistics?...Ch. 1.1 - Identify some methods used in descriptive...Ch. 1.1 - Explain two ways in which descriptive statistics...Ch. 1.1 - Define the following terms: a. Observational study...Ch. 1.1 - Fill in the following blank: Observational studies...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 - 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 - 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. In the special report, Bitter...Ch. 1.2 - Explain why a census is often not the best way to...Ch. 1.2 - Identify two statistical methods other than a...Ch. 1.2 - In sampling, explain why obtaining a...Ch. 1.2 - Provide a scenario of your own in which a sample...Ch. 1.2 - Regarding probability sampling: a. What is it? b....Ch. 1.2 - Regarding simple random sampling: a. What is...Ch. 1.2 - The inferential procedures discussed in this book...Ch. 1.2 - Identify two methods for obtaining a simple random...Ch. 1.2 - What is the acronym used for simple random...Ch. 1.2 - The members of a population are numbered 15. a....Ch. 1.2 - The members of a population are numbered 14. a....Ch. 1.2 - The members of a population are numbered 190. a....Ch. 1.2 - The members of a population are numbered 150. a....Ch. 1.2 - Memorial Day Poll. In the year 2000, an on-line...Ch. 1.2 - Estimating Median Income. Explain why a sample of...Ch. 1.2 - Oklahoma State Officials. The five top Oklahoma...Ch. 1.2 - Oklahoma State Officials. The five top Oklahoma...Ch. 1.2 - Best-Selling Albums. The Recording Industry...Ch. 1.2 - Best-Selling Albums. Refer to Exercise 1.44. a....Ch. 1.2 - Best-Selling Albums. Refer to Exercise 1.44. a....Ch. 1.2 - Social Networking Websites. From Wikipedia.com, we...Ch. 1.2 - Keno. In the game of keno, 20 balls are selected...Ch. 1.2 - The International 500. Each year, Fortune Magazine...Ch. 1.2 - Prob. 50ECh. 1.2 - Prob. 51ECh. 1.2 - Undercoverage. Oftentimes, an accurate and...Ch. 1.2 - Nonresponse. When responses are not obtained from...Ch. 1.2 - Response bias. When the behavior of the...Ch. 1.3 - In each of Exercises 1.551.58, fill in the...Ch. 1.3 - In each of Exercises 1.551.58, fill in the...Ch. 1.3 - In each of Exercises 1.551.58, fill in the...Ch. 1.3 - In each of Exercises 1.551.58, fill in the...Ch. 1.3 - The members of a population have been numbered...Ch. 1.3 - The members of a population have been numbered...Ch. 1.3 - The members of a population have been numbered...Ch. 1.3 - The members of a population have been numbered...Ch. 1.3 - The members of a population have been numbered...Ch. 1.3 - The members of a population have been numbered...Ch. 1.3 - Ghost of Speciation Past. In the article, Ghost of...Ch. 1.3 - Number of Farms. The National Agricultural...Ch. 1.3 - John F. Kennedy. In one of his books, Ted...Ch. 1.3 - Litigation Surveys. In the article,...Ch. 1.3 - Immunization of Schoolchildren. In the article,...Ch. 1.3 - University Parking Facilities. During one year, a...Ch. 1.3 - The International 500. 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. Prozac (fluoxetine...Ch. 1.4 - Treating Heart Failure. In the journal article...Ch. 1.4 - In Exercises 1.921.97, we present descriptions of...Ch. 1.4 - Prob. 93ECh. 1.4 - In Exercises 1.921.97, we present descriptions of...Ch. 1.4 - Prob. 95ECh. 1.4 - In Exercises 1.921.97, we present descriptions of...Ch. 1.4 - In Exercises 1.921.97, we present descriptions of...Ch. 1.4 - Prob. 98ECh. 1.4 - Dental Hygiene: Which Toothbrush? In an experiment...Ch. 1.4 - The Salk Vaccine. In Exercise 1.17 on page 8, we...Ch. 1.4 - In sampling from a population, state which type of...Ch. 1 - Almost any inferential study involves aspects of...Ch. 1 - Regarding observational studies and designed...Ch. 1 - Before planning and conducting a study to obtain...Ch. 1 - Explain the meaning of a. a representative sample....Ch. 1 - Which of the following sampling procedures involve...Ch. 1 - Describe each of the following sampling methods...Ch. 1 - Identify and explain the significance of the three...Ch. 1 - Baseball Scores. From ESPN MLB Scoreboard, we...Ch. 1 - Working Lottery Winners. In a national poll taken...Ch. 1 - British Backpacker Tourists. Research by G. Visser...Ch. 1 - Peanut Allergies. In the article Food Allergy...Ch. 1 - Persistent Poverty and IQ. An article appearing in...Ch. 1 - Wasp Hierarchical Status. In an issue of Discover...Ch. 1 - Incomes of College Students Parents. A researcher...Ch. 1 - On-Time Airlines. From the FlightStats On-time...Ch. 1 - Top North American Athletes. As part of ESPNs...Ch. 1 - QuickVote. TalkBack Live, a production of CNN,...Ch. 1 - Leisure Activities and Dementia. An article...Ch. 1 - Hepatitis B and Pancreatic Cancer. The article...Ch. 1 - Top North American Athletes. Refer to Problem 17....Ch. 1 - Water Quality. In the article Randomized...Ch. 1 - Prob. 23RPCh. 1 - Plant Density and Tomato Yield. In Effects of...Ch. 1 - Child-Proof Bottles. Designing medication...Ch. 1 - Prob. 26RPCh. 1 - Comparing Gas Mileages. An experiment is to be...Ch. 1 - The file named Focus.txt in the Focus Database...Ch. 1 - At the beginning of this chapter, we discussed the...
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