Loose Leaf for Statistical Techniques in Business and Economics
17th Edition
ISBN: 9781260152647
Author: Douglas A. Lind
Publisher: McGraw-Hill Education
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Chapter 17, Problem 53CE
To determine
Find the index of economic activity for each of the 3 months using January as the base period.
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The following is a spreadsheet for forecasting annual revenues for the Gorsuch Corp.
(check picture sent)
a. Complete the following sentence: "The linear model is (or is not) a valid model of the trend of the data because ..."
b. Identify any errors in the model's specification.
c. An incorrect entry has been made in one cell and then copied down. You should be able to spot the cell without making any calculations. Identify the cell and indicate the correct entry for it.
The New York Times reported that Apple has unveiled a new iPad marketed specifically to school districts for use by students (The New York Times website). The -inch iPads will have faster processors and a cheaper price point in an effort to take market share away from Google Chromebooks in public school districts. Suppose that the following data represent the percentages of students currently using Apple iPads for a sample of U.S. public school districts.
Click on the datafile logo to reference the data.
15
22
12
21
26
18
42
29
64
20
15
22
18
24
27
24
26
19
a. Compute the mean and median percentage of students currently using Apple iPads.
Mean
(to decimals)
Median
(to the nearest whole number)
b. Compute the first and third quartiles for these data.
First quartile
(to decimals)
Third quartile
(to decimals)
c. Compute the range and interquartile range for these data.
Range
(to the nearest whole number)
Interquartile range
(to decimals)
d.…
United Dairies, Inc., supplies milk to several independent grocers throughout Dade County, Florida. Managers at United Dairies want to develop a forecast of the number of half-gallons of milk sold per week. Sales data for the past 12 weeks follow and have been transferred in the data file UDFMilk.xlsx download(also posted under week 11 module).
Week
Sales
Week
Sales
1
2750
7
3300
2
3100
8
3100
3
3250
9
2950
4
2800
10
3000
5
2900
11
3200
6
3050
12
3150
By Thursday, April 15 (11:55pm PST), answer the following 2 questions and attach a word doc or excel file to show your work.
Use the data in the file UDFMilk.xlsx downloadto construct a time series plot. What type of pattern exists in the data?
Use exponential smoothing with to develop a forecast of demand for week 13.
Chapter 17 Solutions
Loose Leaf for Statistical Techniques in Business and Economics
Ch. 17 - Prob. 1.1SRCh. 17 - Prob. 1.2SRCh. 17 - Prob. 1ECh. 17 - Prob. 2ECh. 17 - Prob. 3ECh. 17 - Prob. 4ECh. 17 - Prob. 2SRCh. 17 - Prob. 5ECh. 17 - Prob. 6ECh. 17 - Prob. 7E
Ch. 17 - Prob. 8ECh. 17 - Prob. 3SRCh. 17 - Prob. 9ECh. 17 - Prob. 10ECh. 17 - Prob. 4SRCh. 17 - Prob. 11ECh. 17 - Prob. 5SRCh. 17 - Prob. 6SRCh. 17 - Prob. 7SRCh. 17 - Prob. 13ECh. 17 - Prob. 14ECh. 17 - Prob. 15ECh. 17 - Prob. 16ECh. 17 - Prob. 17CECh. 17 - Prob. 18CECh. 17 - Prob. 19CECh. 17 - Prob. 20CECh. 17 - Prob. 21CECh. 17 - Prob. 22CECh. 17 - Prob. 23CECh. 17 - Prob. 24CECh. 17 - Prob. 25CECh. 17 - Prob. 26CECh. 17 - Prob. 27CECh. 17 - Prob. 28CECh. 17 - Prob. 29CECh. 17 - Prob. 30CECh. 17 - Prob. 31CECh. 17 - Prob. 32CECh. 17 - Prob. 33CECh. 17 - Prob. 34CECh. 17 - Prob. 35CECh. 17 - Prob. 36CECh. 17 - Prob. 37CECh. 17 - Prob. 38CECh. 17 - Prob. 39CECh. 17 - Prob. 40CECh. 17 - Prob. 41CECh. 17 - Prob. 42CECh. 17 - Prob. 43CECh. 17 - Prob. 44CECh. 17 - Prob. 45CECh. 17 - Prob. 46CECh. 17 - Prob. 47CECh. 17 - Prob. 48CECh. 17 - Prob. 49CECh. 17 - Prob. 50CECh. 17 - Prob. 51CECh. 17 - Prob. 52CECh. 17 - Prob. 53CECh. 17 - Prob. 54CECh. 17 - Prob. 55CE
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