Statistical Techniques in Business and Economics
Statistical Techniques in Business and Economics
18th Edition
ISBN: 9781260579611
Author: Douglas Lind; William Marchal; Samuel Wathen
Publisher: MCGRAW-HILL HIGHER EDUCATION
Question
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Chapter 18, Problem 35CE

a.

To determine

To graph: The provided data set:

b.

To determine

To describe: The pattern of the time series.

c.

To determine

To explain: The reason for the appropriateness of using seasonally adjusted trend model.

d.

To determine

To evaluate: The seasonally adjusted trend forecasting model. Also, find the MAD.

e.

To determine

To find: The average monthly trend in book store sales.

f.

To determine

To find: The monthly indexes. Also, find the month in which the sales of books are the highest and the lowest.

g.

To determine

To find: The sales for next 9 months.

h.

To determine

To explain: If the made forecasts are good or not.

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