Statistics? ;P How do I find the variance of the probability distribution? I feel like i'm getting it wrong.

Question

lukecrayonz · Answer

lukecrayonz · Answer

@wio

lukecrayonz · Answer

@jim_thompson5910

lukecrayonz · Answer

I got 3.4 for mean
2.2 for variance
and 1.5 for prob distribution

dumbcow · Answer

variance = sum squared deviations/ n-1

dumbcow · Answer

you mean 1.5 for standard deviation?

lukecrayonz · Answer

Oh yeah the book calls it "Standard deviation of the probability distribution" sorry haha

dumbcow · Answer

your answers look about right

lukecrayonz · Answer

lukecrayonz · Answer

And that is yes but for what reason?

lukecrayonz · Answer

or is it B because of the negative 0.10?

dumbcow · Answer

lukecrayonz · Answer

Thank you!