12-19-2016, 10:10 PM

I am going through the User Guide to test the latest release and for my own review. I entered some data for four groups like this into the Inference app:

MAKELIST(RANDNORM(50,3),X,1,10) STO> I1 (through I3) and

MAKELIST(RANDNORM(53,3),X,1,10) STO> I4

So I have generated random samples of size 10 from four populations, where the last of them is different by a mean of 3. Then I tested the null hypothesis with the one-way ANOVA. I confirmed this result in the Num view:

F: 3.207 (correct)

P: 0.03446 (correct)

But I was surprised to see this result in the Plot view:

ChiSquare: -10.8849 (?)

P: 0.03446 (correct)

My questions are:

Why is Chi square in the plot view?

Where does the Chi square statistic come form?

Is the graph in the Plot view for a Chi square distribution or the F distribution?

Thanks!

MAKELIST(RANDNORM(50,3),X,1,10) STO> I1 (through I3) and

MAKELIST(RANDNORM(53,3),X,1,10) STO> I4

So I have generated random samples of size 10 from four populations, where the last of them is different by a mean of 3. Then I tested the null hypothesis with the one-way ANOVA. I confirmed this result in the Num view:

F: 3.207 (correct)

P: 0.03446 (correct)

But I was surprised to see this result in the Plot view:

ChiSquare: -10.8849 (?)

P: 0.03446 (correct)

My questions are:

Why is Chi square in the plot view?

Where does the Chi square statistic come form?

Is the graph in the Plot view for a Chi square distribution or the F distribution?

Thanks!