Intro Stats, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780134210285
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
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Chapter 13, Problem 31E
Mislabeled seafood In 2013 the environmental group Oceana (usa.oceana.org) analyzed 1215 samples of seafood purchased across the United States and genetically compared the pieces to standard gene fragments that can identify the species. Laboratory results indicated that 33% of the seafood was mislabeled according to U.S. Food and Drug Administration guidelines.
- a) Construct a 95% confidence interval for the proportion of all seafood sold in the United States that is mislabeled or misidentified.
- b) Explain what your confidence interval says about seafood sold in the United States.
- c) A 2009 report by the Government Accountability Office says that the Food and Drug Administration has spent very little time recently looking for seafood fraud. Suppose an official said, “That’s only 1215 packages out of the billions of pieces of seafood sold in a year. With the small number tested, I don’t know that one would want to change one’s buying habits.” (An official was quoted similarly in a different but similar context). Is this argument valid? Explain.
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Chapter 13 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
Ch. 13.2 - You want to poll a random sample of 100 students...Ch. 13.2 - Prob. 2JCCh. 13.2 - If you think that about half the students are in...Ch. 13.3 - A Pew Research study regarding cell phones asked...Ch. 13.3 - Prob. 5JCCh. 13.3 - A Pew Research study regarding cell phones asked...Ch. 13.3 - Prob. 7JCCh. 13.3 - Prob. 8JCCh. 13.5 - Prob. 9JCCh. 13.5 - Prob. 10JC
Ch. 13.5 - Prob. 11JCCh. 13 - Website An investment company is planning to...Ch. 13 - Marketing The proportion of adult women in the...Ch. 13 - Prob. 3ECh. 13 - Character recognition An automatic character...Ch. 13 - Prob. 5ECh. 13 - Hows life? Gallup regularly conducts a poll using...Ch. 13 - Prob. 7ECh. 13 - Prob. 8ECh. 13 - Send more money The philanthropic organization in...Ch. 13 - Character recognition, again The automatic...Ch. 13 - Prob. 11ECh. 13 - Prob. 12ECh. 13 - Prob. 13ECh. 13 - Spanking In a 2015 Pew Research study on trends in...Ch. 13 - Prob. 15ECh. 13 - Smoking The Gallup poll described in Exercise 6...Ch. 13 - Prob. 17ECh. 13 - Prob. 18ECh. 13 - Graduation Its believed that as many as 25% of...Ch. 13 - Hiring In preparing a report on the economy, we...Ch. 13 - Margin of error A TV newscaster reports the...Ch. 13 - Another margin of error A medical researcher...Ch. 13 - Conditions For each situation described below,...Ch. 13 - More conditions Consider each situation described....Ch. 13 - Conclusions A catalog sales company promises to...Ch. 13 - More conclusions In January 2002, two students...Ch. 13 - Confidence intervals Several factors are involved...Ch. 13 - Confidence intervals, again Several factors are...Ch. 13 - Cars What fraction of cars made in Japan? The...Ch. 13 - Prob. 30ECh. 13 - Mislabeled seafood In 2013 the environmental group...Ch. 13 - Mislabeled seafood, second course A Consumer...Ch. 13 - Prob. 33ECh. 13 - Prob. 34ECh. 13 - Prob. 35ECh. 13 - Take the offer First USA, a major credit card...Ch. 13 - Teenage drivers An insurance company checks police...Ch. 13 - Junk mail Direct mail advertisers send...Ch. 13 - Prob. 39ECh. 13 - Prob. 40ECh. 13 - Prob. 41ECh. 13 - Gambling A city ballot includes a local initiative...Ch. 13 - Rickets Vitamin D, whether ingested as a dietary...Ch. 13 - Teachers A 2011 Gallup poll found that 76% of...Ch. 13 - Prob. 45ECh. 13 - Back to campus ACT, Inc. reported that 74% of 1644...Ch. 13 - Deer ticks Wildlife biologists inspect 153 deer...Ch. 13 - Prob. 48ECh. 13 - Graduation, again As in Exercise 19, we hope to...Ch. 13 - Better hiring info Editors of the business report...Ch. 13 - Prob. 51ECh. 13 - Another pilot study During routine screening, a...Ch. 13 - Prob. 53ECh. 13 - Amendment A TV news reporter says that a proposed...
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