Standard deviation

Standard deviation

Measure of spread

Standard deviation

• Measure of spread of data about the mean

• 3 s.d. left and right includes ~99% of the data

Standard deviation on the TI-83

• Step 1 - Press "Data"

• Step 2 - type data and press "Enter"

• Step 3 - Press "2nd" and "Stat"

• Step 4 - Press "Enter" (One variable statistics)

• Step 5 - Press "Calc" (List L1 and frequency One)

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