N is the number of terms in the population. Displaystyle bar x frac 1 Nsum _ i1 Nx_ i. An equation for a straight line is called a linear equation.
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Displaystyle bar x frac 1 Nsum _ i1 Nx_ i. To calculate the sample mean through spreadsheet software and calculators you can use the formula. N is the number of terms in the population. An equation for a straight line is called a linear equation.