d. Variance & Standard Deviation

L3-12 [Data: Introducing the Variance and Standard Deviation]

L3-13 [Data: Comparing Data Sets Problem 2 AGAIN!]

L3-14 [Data: The Sample Standard Deviation]

L3-16 [Data: EXTENSION Alternative Formulae for the Standard Deviation]

L3-17 [Data: The Standard Deviation from Summary Statistics]