PsychStatsWiki

• SS总和 = SS组间 + SS组内 = SS组间 + SS被试间 + SS误差
• 
• 注：重复测量方差分析中，由于不考虑被试间的变异性（即个体差异），所以SS组内只需考虑SS误差

和方的计算公式

自由度

• 共有5个自由度, 2个计算均方时要用到

1. 总的 df = N-1
2. 组间方差df = k-1
3. 组内方差df = N-k
4. 被试间方差df = n-1
5. 误差方差df = （N-k） -（n-1）= N-k-n+1

• SS of population = SS between Groups + SS within Groups = SS between Groups + SS between Subjects + SS Error
• 
• Note: In repeated measures ANOVA, since variability between subjects (i.e. individual differences) is not considered, only SS error needs to be considered within the SS group.

The calculation formula for sum of squares

—-

degree of freedom

• There are a total of 5 degrees of freedom, 2 of which need to be used to calculate the mean square

1. Total df = N-1
2. Between group variance df = k-1
3. Within group variance df = N-k
4. Between subject variance df = n-1
5. error variance df = （N-k） -（n-1）= N-k-n+1