Essentials Of Statistics
4th Edition
ISBN: 9781305093836
Author: HEALEY, Joseph F.
Publisher: Cengage Learning,
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Textbook Question
Chapter 2, Problem 2.10P
PA/CJ As part of an evaluation of the efficiency of your local police force, you have gathered the following data on police response tie to calls for assistance during two different years. (Response times were rounded off to whole minutes.) Convert both frequency distributions into percentages, and write a paragraph comparing the changes in response time between the two years.
| Response Time, 2000 | Frequency (f) |
| 21 minutes or more | 20 |
| 16-20 minutes | 90 |
| 11-15 minutes | 185 |
| 6-10 minutes | 370 |
| Less than 6 minutes | 210 |
| Total | 875 |
| Response Time, 2010 | Frequency (f) |
| 21 minutes or more | 45 |
| 16-20 minutes | 95 |
| 11-15 minutes | 155 |
| 6-10 minutes | 350 |
| Less than 6 minutes | 250 |
| Total | 895 |
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Pam, Rob and Sam get a cake that is one-third chocolate, one-third vanilla, and one-third strawberry as shown below. They wish to fairly divide the cake using the lone chooser method. Pam likes strawberry twice as much as chocolate or vanilla. Rob only likes chocolate. Sam, the chooser, likes vanilla and strawberry twice as much as chocolate. In the first division, Pam cuts the strawberry piece off and lets Rob choose his favorite piece. Based on that, Rob chooses the chocolate and vanilla parts. Note: All cuts made to the cake shown below are vertical.Which is a second division that Rob would make of his share of the cake?
Three players (one divider and two choosers) are going to divide a cake fairly using the lone divider method. The divider cuts the cake into three slices (s1, s2, and s3).
If the choosers' declarations are Chooser 1: {s1 , s2} and Chooser 2: {s2 , s3}.
Using the lone-divider method, how many different fair divisions of this cake are possible?
Theorem 2.6 (The Minkowski inequality)
Let p≥1. Suppose that X and Y are random variables, such that E|X|P <∞ and
E|Y P <00. Then
X+YpX+Yp
Chapter 2 Solutions
Essentials Of Statistics
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