Mind on Statistics
5th Edition
ISBN: 9781285463186
Author: Jessica M. Utts, Robert F. Heckard
Publisher: Brooks Cole
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Question
Chapter 8, Problem 8.1E
(a)
To determine
To find: Whether the given variable is discrete or continuous.
(a)
Expert Solution
Answer to Problem 8.1E
The given variable is discrete.
Explanation of Solution
Given:
The variable is “Number of commercials that are shown”.
A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement.
In this case, the given variable, the number of commercials shown, can be counted and does not take unrounded values. Thus, it can be considered an example of a discrete random variable.
Therefore, the variable is a discrete variable.
(b)
To determine
To find: The given variable is discrete or continuous.
(b)
Expert Solution
Answer to Problem 8.1E
The given variable is continuous.
Explanation of Solution
The given variable is the length which is noted in seconds. The variable's length can take any value within a certain
Therefore, the variable is continuous.
(c)
To determine
To find: The given variable is discrete or continuous.
(c)
Expert Solution
Answer to Problem 8.1E
The given variable is discrete.
Explanation of Solution
In this case, the given variable is the number of accidents recorded. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.
Therefore, the variable is discrete.
(d)
To determine
To find: The given variable is discrete or continuous.
(d)
Expert Solution
Answer to Problem 8.1E
The given variable is discrete.
Explanation of Solution
In this case, the given variable is whether the rain is predicted. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.
Therefore, the variable is discrete.
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Students have asked these similar questions
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 8 Solutions
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