The plane 
best fits the points 
and 
if the sum of 
at these points is minimized by 
and 
Find the plane that best fits the points 
, and 
.
Definitions:
Interval Estimate
A range of values used to estimate a population parameter, determined by the sample data and confidence level.
Clothing Expenditures
The amount of money spent on clothing by individuals, households, or other entities.
Marketing Consultant
A professional advisor who helps businesses identify marketing strategies and tactics to increase brand awareness and customer acquisition.
Significance Level
A statistical term that provides the threshold of probability at which you reject the null hypothesis, commonly denoted by alpha.
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