is essential for determining how one variable relates to another: statistical properties of least squares estimators
$$\barx = \frac2 + 4 + 63 = \frac123 = 4$$ Sxx Variance Formula
: Hours studied (( x )) vs. test score (( y )): | ( x ) | ( y ) | |--------|--------| | 2 | 60 | | 4 | 70 | | 6 | 80 | | 8 | 90 | | 10 | 100 | is essential for determining how one variable relates