使用单侧或双侧是由spss 自动指定，这个你是不能改动的。但是，你可以通过调整双侧检验的显著水平来达到进行单侧检验的目的。例如，如果你想进行a=0.05的单侧检验，你可以设定双侧检验的a=0.10，这就相当于单侧检验的a=0.05；如果你想进行a=0.01的单侧检验，你可以设定双侧检验的a=0.02，这就...
Solution: The sample size is 12. Hence the degrees of freedom (df) = 12 – 1 = 11. Mapping the alpha level across the row for one-tailed alpha values and the df of 17 on the left-side of the table, we get our critical value as1.363 When is T Distribution used? T Distribution i...
In the t-distribution table, find the column which contains alpha = 0.05 for the one-tailed test. Then, find the row corresponding to 20 degrees of freedom. The truncated t-table below shows the critical t-value. The row and column intersection in the t-distribution table indicates that th...
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依据t-table, alpha = 0.05, df = 38时, 对于t-table的值为2.0244 2. 计算自由度(Degree of Freedom) Df = (样本1的总数 + 样本2的总数)- 2 3. 声明决策规则 假设计算出来的结果t-value的结果大于2.0244或者小于-2.0244则拒绝 4. 计算T-test统计值 ...
The one-tailed value for the same probability and degrees of freedom can be calculated with T_INV_2T(2*0.05,10), which returns 1.812462. Note: In some tables, probability is described as (1-p). Given a value for probability T_Inv_2T seeks that value x such that T_DIST_RT(x, ...
The one-tailed value for the same probability and degrees of freedom can be calculated with T_INV_2T(2*0.05,10), which returns 1.812462. Note: In some tables, probability is described as (1-p). Given a value for probability T_Inv_2T seeks that value x such that T_DIST_RT(x, ...
依据t-table, alpha = 0.05, df = 38时, 对于t-table的值为2.0244 2. 计算自由度(Degree of Freedom) Df = (样本1的总数 + 样本2的总数)- 2 3. 声明决策规则 假设计算出来的结果t-value的结果大于2.0244或者小于-2.0244则拒绝 4. 计算T-test统计值 ...
The one-tailed value for the same probability and degrees of freedom can be calculated with T_INV_2T(2*0.05,10), which returns 1.812462. Note: In some tables, probability is described as (1-p). Given a value for probability T_Inv_2T seeks that value x such that T_DIST_RT(x, ...