Concept explainers
(a)
To find: The following sample is random. If non-random then explain.
(a)
Answer to Problem 2.1E
The explanation is given below.
Explanation of Solution
Given:
The condition is given as:
A random-number generator activates a device that tests light bulbs coming off the assembly line.
The sample is given as:
Testing is done throughout the
It is non-random because the testing is not done on a random sample of hours in which each elements is equally likely and the selection of each elements is independent but the testing is done throughout the
(b)
To find: The following sample is random. If non-random then explain.
(b)
Answer to Problem 2.1E
The explanation is given below.
Explanation of Solution
Given:
The condition is given as:
A random-number generator activates a device that tests light bulbs coming off the assembly line.
The sample is given as:
Testing is done only during the first two hours of production each day.
It is non-random because the testing is not done on a random sample of hours in which each elements is equally likely and the selection of each elements is independent but the testing is done only during the first two hours of production each day, and this is a convenience sampling in which the elements in the population picked up that are readily at hand.
Chapter 15 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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