Any statistics pros out there?

[Isocene]

I'm in graduate school right now and taking a statistics course. My professor assigned one question for us to try to find and answer using any resource.

So, if anyone is interested in helping me out here is a link(has subscript so I made a screenshot):

Question

Any help would be much appreciated.

 

[KillyKillall]

good luck <bump>

 

[imported_Rat]

Too long, no read.

 

[Isocene]

anyone?

 

[JS80]

Originally posted by: Rat
Too long, no read.

QFT

 

[drinkmorejava]

hmmm, lol, I haven't taken stats in a year, and as far as I know I'm wrong, but it could be related to three standard deviations.

 

[Gunslinger08]

Variance is just the square of standard deviation. If the larger standard deviation falls within 3 times that of the smaller, you conclude they're in the same general range. This may be related to the idea of outliers. Generally, extreme outliers have to be more than 3 times the standard deviation from the mean. Anything giving a ratio of <= 3 in the provide equation isn't an extreme outlier, and therefore can be used in pooled formulas.

 

[Isocene]

Thanks Josh! That makes sense!