Use the following to answer questions:
Figure: Long-Run and Short-Run Average Cost Curves 
-(Figure: Long-Run and Short-Run Average Cost Curves) Look at the figure Long-Run and Short-Run Average Cost Curves. If a firm faced the long-run average total cost curve shown in the figure and it expected to produce 100,000 units of the good in the long run, the firm should build the plant associated with:
Definitions:
Mean Age
The average age of the individuals in a given population or group, calculated by dividing the sum of their ages by the number of individuals.
Effect Size
A quantitative measure of the strength of a phenomenon, used to ascertain the practical significance of research findings.
Statistically Significant
A determination that a result from data analysis has a low probability of occurring by chance, indicating a meaningful difference or relationship.
Practical Importance
Refers to the relevance and applicability of an idea, research finding, or theory to real-world situations.
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