③Power=0.95 ④Number of groups:此例中b1和b2有2组 ⑤Number of measuremens:重复测量的次数——此处为3次 ⑥Corr among rep measures:水平间的相关(组内相关系数),不知道时,填0,也可通过预实验得到推测值时,计入推测值 ⑦Nonsphericition correction ε: 球面假设:1时没有F修正 下限=1/(水平(重复测定)...
功效是检验假设是否成立的概率,通常使用 80%、90% 或 95%。 6. 输入组数:在“number of groups”字段中输入组数。 7. 输入每组的样本量:在“Number of measurements per group”字段中输入每组的样本量。 8. 点击“Calculate”按钮:完成所有输入后,点击“Calculate”按钮进行计算。GPower 将给出所需的最小样本...
③Power=0.95 ④Number of groups:此例中b1和b2有2组 ⑤Number of measuremens:重复测量的次数——此处为3次 ⑥Corr among rep measures:水平间的相关(组内相关系数),不知道时,填0,也可通过预实验得到推测值时,计入推测值 ⑦Nonsphericition correction ε: 球面假设:1时没有F修正 下限=1/(水平(重复测定)...
然后按照计算规律number of covariates=1,number of groups =5,numeratordf = 5-1=4结果显示,统计力水平超过基本水平0.8,因此,该研究样本量符合要求。 图8协方差分析统计力水平大小计算 4 Chi-square test tests 卡方检验属于非参数检验,由于非参检验不存在具体参数和总体正态分布的假设,所以有时被称为自由分布...
gpower allows you to input information such as the number of groups or conditions, the number of measurements, and the desired power analysis type (e.g., a priori, post-hoc, or achieved). Conclusion gpower is a powerful tool for researchers conducting power analysis in the field of ...
1. The number of groups here is the number of cells in the factorial design, 2 x 2 x 3 = 1 2. When you click “Calculate” you see that you need a total N of 128. That works out to 10.67 cases per cell, so bump the N up to 11(12) = 132.:For the effects with 2...
Number of groups = 2 Output: Noncentrality parameter λ = 8.0000000 Critical F = 3.9163246 Denominator df = 126 Total sample size = 128 Actual power = 0.8014596 You need 128 scores, 64 per cell. Since we have a total of 12 cells, that works out to 768 cases. You might end up decidin...
G* power is a free statistical software that allows the user to determine the sample size needed based on a wide variety of tests.
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