Calculations Flashcards
1
Q
Standard deviation equation
A
SD=—
2
Q
1SD of mean
A
68% of all values
3
Q
2 SD of mean
A
95% of all values
4
Q
Why is standard deviation between than the range
A
Takes into account every value and each value’s distance from the mean
Range only takes highest and lowest value into account
SD is less affected by extreme values and anomalies
5
Q
What happens if SD bars overlap?
A
Likely to be due to chance
