Elementary Statistics
12th Edition
ISBN: 9780321836960
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 10.6, Problem 15BSC
To determine
To construct: The
To identify: The best model.
To predict: The value for the year 2010.
To check: The predicted value close to the actual value of 11,655 or not.
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a)Given the data 63, 64, 66, 67, 67, 69, 71, 72 are the units of actual sales of TV in the last eight periods. Find the forecast for the ninth period using simple exponential smoothing.Use α = 0.3 and initial forecast using simple average of last eight months.
b)The sales of a company (in million dollars) for each year are shown in the table below. Find the linear sales trend line.x (year) 2005 2006 2007 2008 2009y (sales) 12 19 29 37 45
plz i need these answers within 4 hrs i need to submit them do the questions manually without using excel or minitab
Use the border crossings data below and a = = 0.3 and ẞ = 0.2.
Truck Crossings
Month
February
113,691
March
139,204
April
121,498
May
127,511
June
131,500
July
105,245
August
126,606
Copy Data
Step 2 of 2: Calculate the adjusted exponential smoothing forecast for September 2011. Assume the forecast component
for February 2011 to be the actual truck crossing value minus the initial trend. Let the initial trend be 10,000 trucks. Round
your answer to two decimal places.
No need to answer everything! Just plot the actual visitors and the forecasts. Compare the accuracy of the forecasts in the 1985 to 1990 period with those subsequent to that period.
Chapter 10 Solutions
Elementary Statistics
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