For each of the following journal entries, describe the event that would have prompted the entry. The first has been completed for you as an example. 
Definitions:
Air Quality Standards
Regulations that define the maximum acceptable concentration of pollutants in the air, set to protect human health and the environment.
Independent Samples
Multiple sets of data that are independently chosen from a population without affecting each other.
Pooled Estimate
A method in statistics used to combine different estimates of the same parameter to find a single, more precise estimate.
Standard Error
A statistical measure of the variance or standard deviation of a sample mean, indicating the precision with which a sample represents a population.
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