Statistics: The Art and Science of Learning from Data (4th Edition)

4th Edition

ISBN: 9780321997838

Author: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg

Publisher: PEARSON

See similar textbooks

Videos

Textbook Question

Chapter 4.2, Problem 21PB

Instructor ratings The website www.ratemyprofessors.com provides students an opportunity to view ratings for instructors at their universities. A group of students planning to register for a statistics course in the upcoming semester are trying to identify the instructors who receive the highest ratings on the site. One student decides to register for Professor Smith’s course because she has the best ratings of all statistics instructors. Another student comments:

a. The website ratings are unreliable because the ratings are from students who voluntarily visit the site to rate their instructors.
b. To obtain reliable information about Professor Smith, they would need to take a simple random sample of the 78 ratings left by students on the site and compile new overall ratings based on those in the random sample.

Which, if either, of the student’s comments are valid?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 4.2, Problem 20PB

Chapter 4.2, Problem 22PB

Chapter 4 Solutions

Statistics: The Art and Science of Learning from Data (4th Edition)

Ch. 4.1 - Cell phones Consider the cell phone Study 3...Ch. 4.1 - High blood pressure and binge drinking Many...Ch. 4.1 - Low-fat versus low-carb diet? One hundred...Ch. 4.1 - Experiments versus observational studies When...Ch. 4.1 - School testing for drugs Example 3 discussed a...Ch. 4.1 - Hormone therapy and heart disease Since 1976 the...Ch. 4.1 - Speaking foreign languages A 2014 study...Ch. 4.1 - Breast-cancer screening A study published in 2010...Ch. 4.1 - Experiment or observe? Explain whether an...Ch. 4.1 - Baseball under a full moon During a baseball game...

Ch. 4.1 - Seat belt anecdote Andy once heard about a car...Ch. 4.1 - Poker as a profession? Tonys mother is extremely...Ch. 4.1 - Whats more to blame for obesity? In a study...Ch. 4.1 - Census every 10 years? A nationwide census is...Ch. 4.2 - Choosing officers A campus club consists of five...Ch. 4.2 - Simple random sample of students In Example 4, a...Ch. 4.2 - Auditing accountsapp Use an app or computer...Ch. 4.2 - Sampling from a directory A local telephone...Ch. 4.2 - Bias due to perceived race A political scientist...Ch. 4.2 - Confederates Some southern states in the United...Ch. 4.2 - Instructor ratings The website...Ch. 4.2 - Job trends The 20132014 Recruiting Trends report,...Ch. 4.2 - Gun control More than 75% of Americans answer yes...Ch. 4.2 - Violent video games and family closeness A recent...Ch. 4.2 - Fracking The journal Energy Policy (2014, 65:...Ch. 4.2 - Teens buying alcohol over Internet In August 2006,...Ch. 4.2 - Cheating spouses and bias In a survey conducted by...Ch. 4.2 - Online dating A story titled Personals, Sex Sites...Ch. 4.2 - Identify the bias A newspaper designs a survey to...Ch. 4.2 - Types of bias Give an example of a survey that...Ch. 4.3 - Smoking affects lung cancer? You would like to...Ch. 4.3 - Never leave home without duct tape There have been...Ch. 4.3 - More duct tape In a follow-up study, 103 patients...Ch. 4.3 - Vitamin B A New York Times article (March 13,...Ch. 4.3 - Facebook study During the one-week period of...Ch. 4.3 - Science faculty selection of grad students In an...Ch. 4.3 - Pain reduction medication Consider an experiment...Ch. 4.3 - Pain reduction medication, continued Consider the...Ch. 4.3 - Pain reduction medication, yet again Revisit the...Ch. 4.3 - Colds and vitamin C For some time there has been...Ch. 4.3 - Reducing high blood pressure A pharmaceutical...Ch. 4.4 - Student loan debt A researcher wants to compare...Ch. 4.4 - Club officers again In Exercise 4.15, two officers...Ch. 4.4 - Security awareness training Of 400 employees at a...Ch. 4.4 - Prob. 45PB Ch. 4.4 - Prob. 46PB Ch. 4.4 - Prob. 47PB Ch. 4.4 - Prob. 48PB Ch. 4.4 - Prob. 49PB Ch. 4.4 - Prob. 50PB Ch. 4.4 - Prob. 51PB Ch. 4.4 - Prob. 52PB Ch. 4.4 - Effect of partner smoking in smoking cessation...Ch. 4 - Cell phones If you want to conduct a study with...Ch. 4 - Observational versus experimental study Without...Ch. 4 - Unethical experimentation Give an example of a...Ch. 4 - Spinal fluid proteins and Alzheimers A research...Ch. 4 - Fear of asbestos Your friend reads about a study...Ch. 4 - NCAA mens basketball poll The last four teams of...Ch. 4 - Sampling your fellow students You are assigned to...Ch. 4 - Prob. 61CP Ch. 4 - Comparing female and male students You plan to...Ch. 4 - Football discipline A large southern university...Ch. 4 - Prob. 64CP Ch. 4 - Voluntary sports polls In 2014, the Pittsburgh...Ch. 4 - Video games mindless? Playing video games not so...Ch. 4 - Physicians health study Read about the first...Ch. 4 - Aspirin prevents heart attacks? During the 1980s...Ch. 4 - Prob. 69CP Ch. 4 - Prob. 70CP Ch. 4 - Prob. 71CP Ch. 4 - Bupropion and nicotine patch study results The...Ch. 4 - Prefer Coke or Pepsi? You want to conduct an...Ch. 4 - Prob. 74CP Ch. 4 - Samples not equally likely in a cluster sample? In...Ch. 4 - Nursing homes You plan to sample residents of...Ch. 4 - Multistage health survey A researcher wants to...Ch. 4 - Hazing Hazing within college fraternities is a...Ch. 4 - Prob. 79CP Ch. 4 - Twins and breast cancer Excessive cumulative...Ch. 4 - Judging sampling design In each of the following...Ch. 4 - Prob. 87CP Ch. 4 - Age for legal alcohol You want to investigate the...Ch. 4 - Prob. 89CP Ch. 4 - Prob. 90CP Ch. 4 - Issues in clinical trials A randomized clinical...Ch. 4 - Prob. 92CP Ch. 4 - Prob. 93CP Ch. 4 - Prob. 94CP Ch. 4 - Prob. 95CP Ch. 4 - Prob. 96CP Ch. 4 - For Exercises 4.974.103, select the best response....Ch. 4 - Prob. 98CP Ch. 4 - For Exercises 4.974.103, select the best response....Ch. 4 - For Exercises 4.974.103, select the best response....Ch. 4 - Prob. 101CP Ch. 4 - For Exercises 4.974.103, select the best response....Ch. 4 - Prob. 103CP Ch. 4 - Systematic sampling A researcher wants to select...Ch. 4 - Prob. 106CP Ch. 4 - Prob. 107CP

Additional Math Textbook Solutions

Find more solutions based on key concepts

Refer to the Real Estate data, which reports information on homes sold in the Goodyear, Arizona, area during th...

Statistical Techniques in Business and Economics

z Scores. In Exercises 5-8, express all z scores with two decimal places. 8. Plastic Waste Data Set 31 “Garbage...

Elementary Statistics Using Excel (6th Edition)

In Exercises 9-20, use the data in the following table, which lists drive-thru order accuracy at popular fast f...

Elementary Statistics (13th Edition)

Empirical versus Theoretical A Monopoly player claims that the probability of getting a 4 when rolling a six-si...

Introductory Statistics (2nd Edition)

1. How is a sample related to a population?

Elementary Statistics: Picturing the World (6th Edition)

Fill in the blank: The probability that a fair coin lands heads is 0.5. Therefore, we can be sure that if we to...

Elementary Statistics ( 3rd International Edition ) Isbn:9781260092561

Knowledge Booster

$Statistics$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.