System Dynamics
3rd Edition
ISBN: 9780073398068
Author: III William J. Palm
Publisher: MCG
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Textbook Question
Chapter 1, Problem 1.24P
The population data for a certain country are given here.
Plot the data and obtain a function that describes the data. Estimate when the population will be double its 2005 size.
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Students have asked these similar questions
Actual lengths of stay at a hospital's emergency department in 2009 are shown in the following table (rounded to the nearest hour).
Length of stay is the total of wait and service times. Some longer stays are also approximated as 15 hours in this table.
Hours Count Percent
1
18
3.40
2
58
10.94
3
82
15.47
4
118
22.26
85
16.04
6
64
12.08
7
37
6.98
8
19
3.58
18
3.40
10
14
2.64
15
17
3.21
Calculate the mean and variance for the random variable (length of stay). Round your answers to two decimal places (e.g. 98.76).
Mean = i
Variance = i
5.
Make the statistical analysis for all of data given into table below using Excel program. N number =9
COUNT
X
1
0.244(N)
2
0.234(N)
3
0.247(N)
4
0.231(N)
5
0.235(N)
6
0.244(N)
7
0.230(N)
8
0.233(N)
9
0.244(N)
10
0.241(N)
11
0.247(N)
12
0.231(N)
For the given data generate the forecast for each of the time period using moving average for n=3
periods and weighted moving average for n=D4, also find the forecast for the 9th 10th and 11th.
S.NO
DEMANDS
MOVING AVERAGE n=3
WEIGHTED MOVING
AVERAGE n=4
1
100
2
120
3
110
4
130
110
140
120
119
160
126.67
129
7
150
143.33
143
8
140
150
148
9.
150
147
Chapter 1 Solutions
System Dynamics
Ch. 1 - Prob. 1.1PCh. 1 - Folklore has it that Sir Isaac Newton formulated...Ch. 1 - A ball is thrown a distance of 50 feet. 5 inches....Ch. 1 - An American football field is 100 yards long. How...Ch. 1 - How long is a 100-meter dash in feet?Ch. 1 - Convert 50 feet per second to miles per hour.Ch. 1 - The speed limit in some countries is 100...Ch. 1 - How many 60 watt lightbulbs are equivalent to one...Ch. 1 - Convert the temperature of 70°F to °C.Ch. 1 - Convert 30°C to °F.
Ch. 1 - A particular motor rotates at 3000 revolutions per...Ch. 1 - The displacement of a certain object is described...Ch. 1 - Prob. 1.13PCh. 1 - The displacement in meters of a certain vibrating...Ch. 1 - The distance a spring stretches from its “free...Ch. 1 - The following “small angle” approximation for the...Ch. 1 - Prob. 1.17PCh. 1 - Obtain two linear approximations of the function...Ch. 1 - Prob. 1.19PCh. 1 - Obtain two linear approximations of the function...Ch. 1 - Obtain a linear approximation of the function fh=h...Ch. 1 - The flow rate f in m3/s of water through a...Ch. 1 - Prob. 1.23PCh. 1 - The population data for a certain country are...Ch. 1 - Prob. 1.25PCh. 1 - Quenching is the process of immersing a hot metal...Ch. 1 - The useful life of a machine bearing depends on...Ch. 1 - 1.28 A certain electric circuit has a resistor and...Ch. 1 - 1.29 Water (of volume 425 ml) in a glass measuring...Ch. 1 - Consider the milk container of Example 1.4.2...Ch. 1 - Consider the milk container of Example 1.4.2...
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