answersLogoWhite

0

It is defined as the positive square root of the mean of the squared deviations from mean. The square of S.D is called variance.

The standard deviation is used as a measure of the variance of a measurement within a group of objects. In essence, it is the average difference between the measurement of any one object and the mean measurement for the group. For example, if the average measured weight of brown bears is 140kg (265lbs) and the standard deviation of weights among brown bears is 5kg (11lbs), then any particular, individual brown bear is likely to weight between 135-145kg (254-276lbs), and very likely to weight between 130-150kg (243-287lbs). It's impossible to know the weight of an individual bear just by looking at the mean weight for all bears, but the standard deviation tells you what range of weights the weight of an individual bear will fall in.

User Avatar

Wiki User

14y ago

Still curious? Ask our experts.

Chat with our AI personalities

RossRoss
Every question is just a happy little opportunity.
Chat with Ross
EzraEzra
Faith is not about having all the answers, but learning to ask the right questions.
Chat with Ezra
RafaRafa
There's no fun in playing it safe. Why not try something a little unhinged?
Chat with Rafa
More answers

I'm not 100% certain - I'm doing it in school and failing miserably - but it's a unit of measurement used to show how spread out the data is from the mean.

You'd need to ask on a maths forum to get something more detailed, though. Sorry.

User Avatar

Wiki User

14y ago
User Avatar

Add your answer:

Earn +20 pts
Q: What is standard deviations?
Write your answer...
Submit
Still have questions?
magnify glass
imp