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What is range
Difference between the highest and lowest values in a set of measurements
How to calculate range?
Maximum value - minimum value
What is standard deviation?
A measure of the spread of a set of values around the mean
How to calculate standard deviation on calculator?
go on menu and go onto statistics
press 1 and input data into column
when all data entered, press OPTN
choose 3 and ox is SD
Why do we use standard deviation
It measures variability of data, compares different sets, identifies outliers, indicates reliability of the mean and helps predict patterns