Answer
The mean can be expressed by $\mu$.
Work Step by Step
The mean can be expressed by $\mu$. Here, the mean is calculated for all groups in the population, not only for a sample group, hence it is a parameter.
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 5 - Discrete Probability Distributions - 5-4 Parameters for Binomial Distributions - Page 226: 4
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