M119L06-page6 - (Lesson 6: Measures of Spread or Variation;...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
(Lesson 6: Measures of Spread or Variation; 3-3) 3.20 Step 4 : VAR, or σ 2 = the average of the squared deviations = 520.8 5 = 104.16 square points One reason why we often prefer the SD over the VAR is that units like “square points” are not natural to us. Step 5 : SD, or = VAR = 104.16 10.2 points Observe that the SD shares the same units as the original data values. Many calculators have a or N button that allows you to compute the
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online