Can someone please explain why you don't square the variance in this problem and do for others??
J Jbueno New Member Feb 28, 2016 #1 Feb 28, 2016 #1 View attachment 5824 Can someone please explain why you don't square the variance in this problem and do for others??
View attachment 5824 Can someone please explain why you don't square the variance in this problem and do for others??
Dason Ambassador to the humans Feb 28, 2016 #2 Feb 28, 2016 #2 When do you ever square the variance? You sometimes square the standard deviation to get the variance. But what you're given is the variance already.
When do you ever square the variance? You sometimes square the standard deviation to get the variance. But what you're given is the variance already.
B blubblub Member Feb 29, 2016 #3 Feb 29, 2016 #3 Dason said: When do you ever square the variance? ..... Click to expand... Actually in determining the degrees of freedom in a Welch t-test you square the variance.
Dason said: When do you ever square the variance? ..... Click to expand... Actually in determining the degrees of freedom in a Welch t-test you square the variance.