Statistics for Business and Economics
8th Edition
ISBN: 9780132745659
Author: Paul Newbold, William Carlson, Betty Thorne
Publisher: PEARSON
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Question
Chapter 1.4, Problem 20E
To determine
The time series plot for shopping in the new mall.
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The following table lists the number of daily visitors to the Web site of a new business during its first year.
Month
Number
Month
Number
1
2
3
4
5
6
5,400
5,372
5,265
5,250
5,289
5,350
7
8
9
10
11
12
5,600
5,520
5,280
5,400
5,448
5,500
a. Graph the data with a time-series plot using a vertical scale from 5,000 to 5,700.b. Graph the data with a time-series plot using a vertical scale from 4,000 to 7,000. c. Comment on the difference between these two time-series plots.
Suppose you have an extra six months of data on demands and prices, in addition to the data in the example. These extra data points are (350,84), (385,72), (410,67), (400,62), (330,92), and (480,53). (The price is shown first and then the demand at that price.) After adding these points to the original data, use Excel’s Trendline tool to find the best-fitting linear, power, and exponential trend lines. Then calculate the MAPE for each of these, based on all 18 months of data. Does the power curve still have the smallest MAPE?
Decomposition of a time series of a souvenir shop's sales is shown in the plot below. Choose all of the following which are true for this time series
Select one or more:
a. The sales peak right before new year's
b. There are quarterly (3-monthly) seasonal cycles in this tie series
c. There is an increase trend in the time series
d. This time series is not stationary
e. There is no seasonality in this time series
Chapter 1 Solutions
Statistics for Business and Economics
Ch. 1.2 - Prob. 1ECh. 1.2 - Prob. 2ECh. 1.2 - Prob. 3ECh. 1.2 - Prob. 4ECh. 1.2 - Prob. 5ECh. 1.2 - Prob. 6ECh. 1.2 - Prob. 7ECh. 1.2 - Prob. 8ECh. 1.3 - Prob. 9ECh. 1.3 - Prob. 10E
Ch. 1.3 - Prob. 11ECh. 1.3 - Prob. 12ECh. 1.3 - Prob. 13ECh. 1.3 - Prob. 14ECh. 1.3 - Prob. 15ECh. 1.3 - Prob. 16ECh. 1.3 - Prob. 17ECh. 1.3 - Prob. 18ECh. 1.3 - Prob. 19ECh. 1.4 - Prob. 20ECh. 1.4 - Prob. 21ECh. 1.4 - Prob. 22ECh. 1.4 - Prob. 23ECh. 1.4 - Prob. 24ECh. 1.4 - Prob. 25ECh. 1.4 - Prob. 26ECh. 1.4 - Prob. 27ECh. 1.4 - Prob. 28ECh. 1.4 - Prob. 29ECh. 1.5 - Prob. 30ECh. 1.5 - Prob. 31ECh. 1.5 - Prob. 32ECh. 1.5 - Prob. 33ECh. 1.5 - Prob. 34ECh. 1.5 - Prob. 35ECh. 1.5 - Prob. 36ECh. 1.5 - Prob. 37ECh. 1.5 - Prob. 38ECh. 1.5 - Prob. 39ECh. 1.5 - Prob. 40ECh. 1.5 - Prob. 41ECh. 1.5 - Prob. 42ECh. 1.5 - Prob. 43ECh. 1.5 - Prob. 44ECh. 1.5 - Sales revenue totals (in dollars) by day of the...Ch. 1.5 - Prob. 46ECh. 1.6 - Prob. 47ECh. 1.6 - Prob. 48ECh. 1.6 - Prob. 49ECh. 1.6 - Prob. 50ECh. 1 - Prob. 51ECh. 1 - Prob. 52ECh. 1 - Prob. 53ECh. 1 - Prob. 54ECh. 1 - Prob. 55ECh. 1 - Prob. 56ECh. 1 - Prob. 57ECh. 1 - Prob. 58ECh. 1 - Prob. 59ECh. 1 - Prob. 60ECh. 1 - Prob. 61ECh. 1 - Prob. 62ECh. 1 - Prob. 63ECh. 1 - Prob. 64ECh. 1 - Prob. 65ECh. 1 - Prob. 66ECh. 1 - Prob. 67ECh. 1 - Prob. 68ECh. 1 - Prob. 69ECh. 1 - Prob. 71ECh. 1 - Prob. 72ECh. 1 - Prob. 73ECh. 1 - Prob. 74E
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