Hi - I'm stuck on this question:
Given the following sample of three measurements,
10.0 15.2 17.2
what value must be added to the sample to make a new sample having double the variance of these three measurements?
I know the formula for the sample variance but have no idea of how to calculate the new added value....
Any help would be greatly appreciated.
Re: Variance question
Calculate the variance of 10.0 15.2 17.2. Call the number a.
Originally Posted by FelixHelix
Calculate the variance of 10.0 15.2 17.2 x. Call the result b. It will have x in it.
Solve b = 2a for x.