Stats: Data and Models
5th Edition
ISBN: 9780135164013
Author: DeVeaux
Publisher: PEARSON CO
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Chapter 20, Problem 88E
To determine
Explain whether a difference of 242.7 is statistically significant or not.
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For each of the time series, construct a line chart of the data and identify the characteristics of the time series (that is, random, stationary, trend, seasonal, or cyclical).
Date IBM9/7/2010 $125.959/8/2010 $126.089/9/2010 $126.369/10/2010 $127.999/13/2010 $129.619/14/2010 $128.859/15/2010 $129.439/16/2010 $129.679/17/2010 $130.199/20/2010 $131.79
a. Construct a line chart of the closing stock prices data. Choose the correct chart below.
For each of the time series, construct a line chart of the data and identify the characteristics of the time series (that is, random, stationary, trend, seasonal, or cyclical)
Date IBM9/7/2010 $125.959/8/2010 $126.089/9/2010 $126.369/10/2010 $127.999/13/2010 $129.619/14/2010 $128.859/15/2010 $129.439/16/2010 $129.679/17/2010 $130.199/20/2010 $131.79
1. A consumer group claims that the mean annual consumption of cheddar cheese by a person in
the United States is at most 10.3 pounds. A random sample of 100 people in the United States has
a mean annual cheddar cheese consumption of 9.9 pounds. Assume the population standard
deviation is 2.1 pounds. At a = 0.05, can you reject the claim? (Adapted from U.S. Department of
Agriculture)
State the hypotheses:
Calculate the test statistic:
Calculate the P-value:
Conclusion (reject or fail to reject Ho):
2. The CEO of a manufacturing facility claims that the mean workday of the company's assembly
line employees is less than 8.5 hours. A random sample of 25 of the company's assembly line
employees has a mean workday of 8.2 hours. Assume the population standard deviation is 0.5
hour and the population is normally distributed. At a = 0.01, test the CEO's claim.
State the hypotheses:
Calculate the test statistic:
Calculate the P-value:
Conclusion (reject or fail to reject Ho):
Statistics
Chapter 20 Solutions
Stats: Data and Models
Ch. 20.2 - A public broadcasting station plans to launch a...Ch. 20.2 - Prob. 2JCCh. 20.3 - 3. A February 2014 public opinion poll asked 1000...Ch. 20.3 - Prob. 4JCCh. 20.4 - Prob. 5JCCh. 20.4 - Prob. 6JCCh. 20.4 - Prob. 7JCCh. 20.4 - Prob. 8JCCh. 20.5 - Prob. 9JCCh. 20.5 - Prob. 10JC
Ch. 20.5 - Prob. 11JCCh. 20 - Prob. 1ECh. 20 - Prob. 2ECh. 20 - Prob. 3ECh. 20 - Prob. 4ECh. 20 - Prob. 5ECh. 20 - Prob. 6ECh. 20 - Prob. 7ECh. 20 - Prob. 8ECh. 20 - Prob. 9ECh. 20 - Prob. 10ECh. 20 - Prob. 11ECh. 20 - Prob. 12ECh. 20 - Prob. 13ECh. 20 - Prob. 14ECh. 20 - Prob. 15ECh. 20 - Prob. 16ECh. 20 - Prob. 17ECh. 20 - 18. Athlete ages, overtime Repeat the test you did...Ch. 20 - Prob. 19ECh. 20 - Prob. 20ECh. 20 - Prob. 21ECh. 20 - 22. Science news At the end of 2013, the Pew...Ch. 20 - Prob. 23ECh. 20 - 24. Regulating access When a random sample of 935...Ch. 20 - Prob. 25ECh. 20 - 26. Buy it again? A consumer magazine plans to...Ch. 20 - Prob. 27ECh. 20 - Prob. 28ECh. 20 - Prob. 29ECh. 20 - Prob. 30ECh. 20 - Prob. 31ECh. 20 - Prob. 32ECh. 20 - Prob. 33ECh. 20 - 34. Anorexia The Journal of the American Medical...Ch. 20 - Prob. 35ECh. 20 - Prob. 36ECh. 20 - Prob. 37ECh. 20 - Prob. 38ECh. 20 - Prob. 39ECh. 20 - 40. Politics and sex One month before the...Ch. 20 - 41. Mammograms It’s widely believed that regular...Ch. 20 - Prob. 42ECh. 20 - Prob. 43ECh. 20 - Prob. 44ECh. 20 - Prob. 45ECh. 20 - Prob. 46ECh. 20 - Prob. 47ECh. 20 - Prob. 48ECh. 20 - Prob. 49ECh. 20 - Prob. 50ECh. 20 - Prob. 51ECh. 20 - Prob. 52ECh. 20 - Prob. 53ECh. 20 - Prob. 54ECh. 20 - Prob. 55ECh. 20 - Prob. 56ECh. 20 - Prob. 57ECh. 20 - 58. Stereograms In Exercises 49 and 50, Chapter 4,...Ch. 20 - Prob. 59ECh. 20 - Prob. 60ECh. 20 - 61. Commuting A man who moves to a new city sees...Ch. 20 - 62. Pulse rates A researcher wanted to see whether...Ch. 20 - Prob. 63ECh. 20 - Prob. 64ECh. 20 - Prob. 65ECh. 20 - Egyptians Some archaeologists theorize that...Ch. 20 - Prob. 67ECh. 20 - 68. Streams In Chapter 6, Exercise 25, we looked...Ch. 20 - 69. Cholesterol and gender Are men or women at...Ch. 20 - 70. Memory Does ginkgo biloba enhance memory? In...Ch. 20 - 71. Home runs 2016 American League baseball teams...Ch. 20 - 72. Hard water by region Recall from Chapter 7,...Ch. 20 - Prob. 73ECh. 20 - Prob. 74ECh. 20 - Prob. 75ECh. 20 - Prob. 76ECh. 20 - Prob. 77ECh. 20 - Prob. 78ECh. 20 - Prob. 79ECh. 20 - Prob. 80ECh. 20 - 83. Tees Does it matter what kind of tee a golfer...Ch. 20 - Prob. 84ECh. 20 - Prob. 85ECh. 20 - Prob. 86ECh. 20 - Prob. 87ECh. 20 - Prob. 88E
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