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Standard Deviation

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Total cards: 12•Content version: v3•Public deck•Updated: 8/1/2026

Card preview (12)

#1
Front (Question)

What is standard deviation?

Back (Answer)

a measure of the average variation of the data points away from the mean (how spread the data are)

#2
Front (Question)

What does S stand for?

Back (Answer)

standard deviation

#3
Front (Question)

What does Σ stand for?

Back (Answer)

sum of

#4
Front (Question)

What does x stand for?

Back (Answer)

data point

#5
Front (Question)

What does x̅ stand for?

Back (Answer)

mean

#6
Front (Question)

What does n stand for?

Back (Answer)

total number of data points

#7
Front (Question)

step 1 - what do you do first?

Back (Answer)

calculate the mean

#8
Front (Question)

step 2 - What do you subtract next?

Back (Answer)

subtract the mean from every data point (in the x row)

#9
Front (Question)

step 3 - What do you square?

Back (Answer)

in the x - xbar row, times the results by themselves

#10
Front (Question)

step 4 - What do you add up?

Back (Answer)

add up the sum of the squared answers

#11
Front (Question)

step 5 - What do you divide?

Back (Answer)

divide by n-1

#12
Front (Question)

step 6 - What do you square root?

Back (Answer)

square root the figure to give the standard deviation