Let's now calculate the effect size measure Cohen's d. Just like before with
the one sample t test. Cohen's d is the mean difference divided by the standard
deviation for the differences. Remember that the mean differences was negative
2.72. And the standard deviation was 3.69. Calculate Cohen's d? Just like
before with the one sample t test.
Vamos calcular a medida do tamanho
de efeito, o d de Cohen.
Assim como antes,
na amostra do teste t,
o d de Cohen
é a diferença média
dividida pelo desvio
padrão das diferenças.
Lembrando
que a diferença média era -2,72,
e que o desvio padrão era 3,69,
calcule o d de Cohen.
现在来计算效应量衡量指标
和之前的单样本 t 检验一样
等于均值差异除以差异标准偏差 均值差异为 -2.72
标准偏差是 3.69 请像之前的单样本 t 检验一样
算出 Cohen's d