Suppose I have a radar gun that can measure velocity with an internal error with a mean of 3 m/s and a standard deviation of 1m/s on that error(adsbygoogle = window.adsbygoogle || []).push({});

eg velocity

10 +- 2.8

6 +- 3.1

21 +- 3.2

and so on. Now I want to make a prediction of the future when I get a new radar gun. It will have an internal error of roughly 1m/s

How then do I scale the std deviation? by a factor of three?

Thanks all!

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# Estimating the FUTURE!

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