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 19, Problem 5E
Customer ages An analyst at a local bank wonders if the age distribution of customers coming for service at his branch in town is the same as at the branch located near the mall. He selects 100 transactions at random from each branch and researches the age information for the associated customer. Here are the data:
- a) What is the null hypothesis?
- b) What type of test is this?
- c) What are the expected numbers for each cell if the null hypothesis is true?
- d) Find the χ2 statistic.
- e) How many degrees of freedom does it have?
- f) Find the P-value.
- g) What do you conclude?
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Chapter 19 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
Ch. 19.3 - Why do we need the control group?Ch. 19.3 - Prob. 2JCCh. 19.3 - Prob. 3JCCh. 19.3 - Prob. 4JCCh. 19.3 - Prob. 5JCCh. 19.3 - Prob. 6JCCh. 19.4 - Prob. 7JCCh. 19.4 - Prob. 8JCCh. 19.4 - Prob. 9JCCh. 19 - Human births If there is no seasonal effect on...
Ch. 19 - Bank cards At a major credit card bank, the...Ch. 19 - Prob. 3ECh. 19 - Prob. 4ECh. 19 - Customer ages An analyst at a local bank wonders...Ch. 19 - Bank cards, once more A market researcher working...Ch. 19 - Human births, last time For the data in Exercise...Ch. 19 - Prob. 8ECh. 19 - Iliad injuries 800 BCE Homers Iliad is an epic...Ch. 19 - Prob. 10ECh. 19 - Prob. 11ECh. 19 - Prob. 12ECh. 19 - Dice After getting trounced by your little brother...Ch. 19 - MMs As noted in an earlier chapter, Mars Inc. says...Ch. 19 - Nuts A company says its premium mixture of nuts...Ch. 19 - Prob. 16ECh. 19 - NYPD and race Census data for New York City...Ch. 19 - Violence against women In its study When Men...Ch. 19 - Fruit flies Offspring of certain fruit flies may...Ch. 19 - Prob. 20ECh. 19 - Prob. 21ECh. 19 - Lottery numbers The fairness of the South African...Ch. 19 - Prob. 23ECh. 19 - Prob. 24ECh. 19 - Childbirth, part 2 In Exercise 23, the table shows...Ch. 19 - Prob. 26ECh. 19 - Prob. 27ECh. 19 - Prob. 28ECh. 19 - Prob. 29ECh. 19 - Does your doctor know? (part 4) In Exercises 24,...Ch. 19 - Prob. 31ECh. 19 - Prob. 32ECh. 19 - Prob. 33ECh. 19 - NYPD The table below shows the rank attained by...Ch. 19 - Prob. 35ECh. 19 - NYPD again Examine and comment on this table of...Ch. 19 - Cranberry juice Its common folk wisdom that...Ch. 19 - Prob. 38ECh. 19 - Montana A poll conducted by the University of...Ch. 19 - Fish diet Medical researchers followed 6272...Ch. 19 - Prob. 41ECh. 19 - Working parents In April 2009, Gallup published...Ch. 19 - Grades Two different professors teach an...Ch. 19 - Full moon Some people believe that a full moon...Ch. 19 - Grades, again In some situations where the...Ch. 19 - Full moon, next phase In Exercise 44, you found...Ch. 19 - Racial steering A subtle form of racial...Ch. 19 - Survival on the Titanic Newspaper headlines at the...Ch. 19 - Prob. 49ECh. 19 - Education by age Use the survey results in the...
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