Mathematics All Around (6th Edition)
6th Edition
ISBN: 9780134434681
Author: Tom Pirnot
Publisher: PEARSON
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Textbook Question
Chapter 4.4, Problem 1E
Sharpening Your Skills.
In Exercises 1 – 4, assume that the time is measured in days.
Use the following PERT diagram to answer the following questions:
a. Find a critical path for task I.
b. Find a critical path for task E.
c. On what day will task H begin?
d. When will task I be completed?
e. What is the fewest number of days needed to complete this project?
f. Find a critical path for the vertex “End.”
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A classification study involving several classifiers was carried out. After training and the usual validation step, the following table
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Sensitivity
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M1
0.82
0.82
M2
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0.72
M3
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M4
0.46
0.47
M5
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M8
0.72
0.24
M9
0.47
0.82
M10
0.06
0.84
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statement.
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Hint 2: to help you visualize and compare classifiers, you may want to plot the classifier data in a ROC graph (which will not be
submitted).
Select one:
Qa.
O b.
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d.
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M1 dominates all of M4, M5 and M6
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e.
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XY
1
0
1
1
1
1
1
1
00
1
1
1
0 0
1
1
1
0
1
1
This data set will be analysed after centering all columns (not scaling). In what follows, the centered data columns are referred to as
X and Y. Using these centered columns, we have the following quantities: XTX = 24/11 = 2.1818; XTY = 13/11 =
and YTY = 24/11 = 2.1818.
Ridge regression
Q1 For 2 =
R
AR
=
1.1818
0.56, compute and write in the provided space the ridge estimate ẞ (0.56). Use decimal numbers, not fractions.
Q2 Using the ridge estimate ẞ (0.56) you just computed, determine the percentage of shrinkage achieved with respect to the
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L
(a) = 0.5833 * (1 -0.78572); (A) = 0.5417 *…
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Chapter 4 Solutions
Mathematics All Around (6th Edition)
Ch. 4.1 - In Exercise 1-6, determine whether the graph is...Ch. 4.1 - In Exercise 1-6, determine whether the graph is...Ch. 4.1 - In Exercise 1-6, determine whether the graph is...Ch. 4.1 - In Exercise 1-6, determine whether the graph is...Ch. 4.1 - In Exercise 1-6, determine whether the graph is...Ch. 4.1 - In Exercise 1-6, determine whether the graph is...Ch. 4.1 - In Exercises 7-12, use Eulers theorem to decide...Ch. 4.1 - In Exercises 7-12, use Eulers theorem to decide...Ch. 4.1 - In Exercises 7-12, use Eulers theorem to decide...Ch. 4.1 - In Exercises 7-12, use Eulers theorem to decide...
Ch. 4.1 - In Exercises 7-12, use Eulers theorem to decide...Ch. 4.1 - In Exercises 7-12, use Eulers theorem to decide...Ch. 4.1 - In Exercise 13-16, if the given graph is Eulerian,...Ch. 4.1 - In Exercise 13-16, if the given graph is Eulerian,...Ch. 4.1 - In Exercise 13-16, if the given graph is Eulerian,...Ch. 4.1 - In Exercise 13-16, if the given graph is Eulerian,...Ch. 4.1 - In Exercises 17-24, try to give an example of each...Ch. 4.1 - Prob. 18ECh. 4.1 - In Exercises 17-24, try to give an example of each...Ch. 4.1 - In Exercises 17-24, try to give an example of each...Ch. 4.1 - In Exercises 17-24, try to give an example of each...Ch. 4.1 - Prob. 22ECh. 4.1 - Prob. 23ECh. 4.1 - Prob. 24ECh. 4.1 - In Exercise 25-28, remove one edge to make the...Ch. 4.1 - Prob. 26ECh. 4.1 - Prob. 27ECh. 4.1 - In Exercise 25-28, remove one edge to make the...Ch. 4.1 - In Exercise 29-32, try to redraw the given graph...Ch. 4.1 - In Exercise 29-32, try to redraw the given graph...Ch. 4.1 - In Exercise 29-32, try to redraw the given graph...Ch. 4.1 - In Exercise 29-32, try to redraw the given graph...Ch. 4.1 - Finding an efficient route. 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