STATISTICS F/BUSINESS+ECONOMICS-TEXT
13th Edition
ISBN: 9781305881884
Author: Anderson
Publisher: CENGAGE L
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Textbook Question
Chapter 17, Problem 42SE
The following table reports the percentage of stocks in a portfolio for nine quarters from 2010 to 2012.
| Quarter | Stock % |
| 1st—2010 | 29.8 |
| 2nd—2010 | 31.0 |
| 3rd—2010 | 29.9 |
| 4th—2010 | 30.1 |
| 1st—2011 | 32.2 |
| 2nd—2011 | 31.5 |
| 3rd—2011 | 32.0 |
| 4th—2011 | 31.9 |
| 1st—2012 | 30.0 |
- a. Construct a time series plot. What type of pattern exists in the data?
- b. Use exponential smoothing to forecast this time series. Consider smoothing constants of α = .2, .3, and .4. What value of the smoothing constant provides the most accurate forecasts?
- c. What is the forecast of the percentage of stocks in a typical portfolio for the second quarter of 2009?
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The rate of return for the last 19 years of a certain segment of the stock market is given in the table.
(The data is also provided below the table as a comma-separated list to make it easier to copy.)
Market Segment Rate of
Return, 2002-2020
Year
Rate of Return (%)
2020
3.23
2019
6.14
2018
11.39
2017
15.99
2016
3.24
2015
-3.86
2014
-1.04
2013
8.49
2012
5.93
2011
6.96
2010
1.98
2009
3.13
2008
-6.55
2007
7.27
2006
3.02
2005
-1.34
2004
7.28
2003
6.27
2002
-0.76
Rate of Return (%):
3.23, 6.14, 11.39, 15.99, 3.24, -3.86, -1.04, 8.49, 5.93, 6.96, 1.98, 3.13, -6.55, 7.27, 3.02, -1.34, 7.28,
6.27, -0.76
Find the 34th percentile of the data.
6.46
the values of alabama building contracts (in $ millions) for a 12-month period follow.240 350 230 260 280 320 220 310 240 310 240 230a. construct a time series plot. What type of pattern exists in the data?
4. The US real unemployment rates over a 12-year period are listed. Use a time series chart to display the
data. Describe any patterns.
Year 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
Rate 9.3% 8.4% 8.4% 9.2% 14.2% 16.7% 16.2% 15.2% 14.5% 12.7% 11.3% 9.9%
Chapter 17 Solutions
STATISTICS F/BUSINESS+ECONOMICS-TEXT
Ch. 17.2 - Consider the following time series data. Week 1 2...Ch. 17.2 - Refer to the time series data in exercise 1. Using...Ch. 17.2 - Exercises 1 and 2 used different forecasting...Ch. 17.2 - Consider the following time series data. Month 1 2...Ch. 17.3 - Consider the following time series data. Week 1 2...Ch. 17.3 - Consider the following time series data. Month 1 2...Ch. 17.3 - Refer to the gasoline sales time series data in...Ch. 17.3 - Refer again to the gasoline sales time series data...Ch. 17.3 - With the gasoline time series data from Table...Ch. 17.3 - With a smoothing constant of = .2, equation...
Ch. 17.3 - For the Hawkins Company, the monthly percentages...Ch. 17.3 - Corporate triple-A bond interest rates for 12...Ch. 17.3 - The values of Alabama building contracts (in ...Ch. 17.3 - The following time series shows the sales of a...Ch. 17.3 - Ten weeks of data on the Commodity Futures Index...Ch. 17.3 - The U.S. Census Bureau tracks the median price for...Ch. 17.4 - Consider the following time series data. a....Ch. 17.4 - Prob. 18ECh. 17.4 - Consider the following time series. a. Construct a...Ch. 17.4 - Prob. 20ECh. 17.4 - Prob. 21ECh. 17.4 - The Seneca Childrens Fund (SCF) is a local charity...Ch. 17.4 - The following table shows Googles annual revenue...Ch. 17.4 - FRED (Federal Reserve Economic Data), a database...Ch. 17.4 - Quarterly revenue ( millions) for Twitter for the...Ch. 17.4 - Giovanni Food Products produces and sells frozen...Ch. 17.4 - Prob. 27ECh. 17.5 - Consider the following time series. a. Construct a...Ch. 17.5 - Consider the following time series data. a....Ch. 17.5 - The quarterly sales data (number of copies sold)...Ch. 17.5 - Air pollution control specialists in southern...Ch. 17.5 - South Shore Construction builds permanent docks...Ch. 17.5 - Prob. 33ECh. 17.5 - Three years of monthly lawn-maintenance expenses...Ch. 17.6 - Consider the following time series data. a....Ch. 17.6 - Refer to exercise 35. a. Deseasonalize the time...Ch. 17.6 - The quarterly sales data (number of copies sold)...Ch. 17.6 - Three years of monthly lawn-maintenance expenses...Ch. 17.6 - Air pollution control specialists in southern...Ch. 17.6 - Electric power consumption is measured in...Ch. 17 - The weekly demand (in cases) for a particular...Ch. 17 - The following table reports the percentage of...Ch. 17 - United Dairies. Inc., supplies milk to several...Ch. 17 - The data contained in the DATAfile named CrudeCost...Ch. 17 - Annual retail store revenue for Apple from 2007 to...Ch. 17 - The Mayfair Department Store in Davenport, Iowa,...Ch. 17 - Prob. 47SECh. 17 - The Costello Music Company has been in business...Ch. 17 - Consider the Costello Music Company problem in...Ch. 17 - Refer to the Costello Music Company problem in...Ch. 17 - Refer to the Costello Music Company time series in...Ch. 17 - Hudson Marine has been an authorized dealer for CD...Ch. 17 - Refer to the Hudson Marine problem in exercise 52....Ch. 17 - Refer to the Hudson Marine problem in exercise 53....Ch. 17 - Refer to the Hudson Marine data in exercise 53. a....Ch. 17 - Forecasting Food and Beverage Sales The Vintage...Ch. 17 - Forecasting Lost Sales The Carlson Department...
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