Answer
No.
Work Step by Step
It is not a good estimator, because it is not a simple random sample of the population, but it is a convenience sample, which does not represent the whole population.
Essentials of Statistics (5th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0-32192-459-2
ISBN 13:
978-0-32192-459-9
Chapter 6 - Normal Probability Distributions - 6-4 Sampling Distributions and Estimators - Page 275: 5
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