Question

Rasheed examined the gre math scores of the first-year graduate students in his statistics class to see the variability. rasheed found the variance to be 14,400. what is the standard deviation for this data?

Answer 1

The standard deviation, generally denoted by
`\displaystyle{ \sigma`, is the square root of the variance v.

So the formula is :
`\displaystyle{ \sigma = √(v)`

thus, for v=14,400 we have
`\displaystyle{ \sigma = √(14,400)=120`


Answer: 120