Given below is the scatter plot of the number of employees and the total revenue ($millions)of 20 U.S.companies.Companies that have higher numbers of employees appear to also have higher total revenue. 
Definitions:
Z-score
A statistical measurement that describes a value's relationship to the mean of a group of values, measured in terms of standard deviations from the mean.
P-value
A statistical measure that helps to determine the significance of results obtained in hypothesis testing.
Observed Value
The actual data point or result that is measured or collected in an experiment or study.
Dependent Populations
Populations in which the members or subjects are not independent of each other, meaning the selection or outcome of one influences another.
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