How to calculate df for all ANOVA

Formulas for df in ANOVA. How to calculate

What is df? df stands for degrees of freedom. The simplest way to grasp this concept is to think of a game in which a list of numbers is hidden except for the n (how many) and the mean. You are asked to draw one number and asked to guess the number. Of course, you cannot guess it. When you draw the last number, you are asked to guess it, and of course you can guess it. At this point, thee are no more degrees of freedom What you should remember is:

Every time you calculate a mean, you lose 1 degree of freedom. The formula for degrees of freedom, df df= n-1

Here are the formulas for df in ANOVA. How to calculate df for all ANOVA designs

ONE-WAY ANOVA SUMMARY TABLE

Source	SS	df	MS	F	p
Berween		number of independent groups minus 1
Within		total number of scores minus number of independent groups
Total		total number of scores minus 1

2x2 FACTORIAL ANOVA SUMMARY TABLE

Source	SS	df	MS	F	p
Berween A		number of independent groups of factor A minus 1
Between B		number of independent groups of factor B minus 1
AxB (interaction)		df A x df B
Within		total number of scores minus number of groups
Total		total number of scores minus 1

ANOVA MIXED SPIT PLOT SUMMARY TABLE

SOURCE	SS	df	MS	F	p
Between Independent
B		number of independent groups minus 1
Error		total number of subjects minus the number of independent groups
Total		total number of subjects minus 1
Between repeated measures
A		number of repetitions minus 1
AxB		df A x df B
Error		error between independent x number of repetitions
Total
TOTAL		total number of scores minus 1

REPEATED MEASURES ANOVA SUMMARY TABLE

SOURCE	SS	df	MS	F	p
Between Treatments		number of treatments minus 1
Between Rows		number of subjects minus 1
Error		df between x df rows
Total		total number of scores minus 1

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