Chi-Squared Distributions

Homogeneity X - A

X is calculated based on the sum of all experiments, summed over each class. A X is calculated for each experiment separately. The homogeneity X is calculated from the sum of the X calculated separately for each experiment minus the X calculated from the sum of each class across all experiments.

Example

Plants		Round	Wrinkled	df	X²
1	Observed	45	12
	Expected	42.75	14.25
	(O-E)²/E	0.12	0.36	1	0.48

2	Observed	27	8
	Expected	26.25	8.75
	(O-E)²/E	0.02	0.06	1	0.08

3	Observed	24	7
	Expected	23.25	7.75
	(O-E)²/E	0.02	0.07	1	0.09

4	Observed	19	10
	Expected	21.75	7.25
	(O-E)²/E	0.35	1.04	1	1.39

5	Observed	32	11
	Expected	32.25	10.75
	(O-E)²/E	0.002	0.006	1	0.01

Totals				5	2.05

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Homogeneity X - A

Example

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