The sampling mean 
is the ____ estimate for the population mean 
.
Definitions:
Scatterplot
A diagram that maps out the values of two measures to reveal any correlations between them.
Associated Variables
Variables that are linked in some way, showing a statistical relationship through correlation or causation analysis.
Lurking Variables
Variables that are not directly studied but can influence the outcome of an experiment or study, potentially confounding the results.
Explanatory Variable
A type of independent variable that is manipulated to determine its relationship with observations in an experiment or study.
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