Solution: We can deduce the following from our problem statement. The sample size is 18. Therefore the degrees of freedom (df) = 18 – 1 = 17. We can also see that the test is two-tailed and has an alpha level of 0.30. So on the T-Table, we map the column for two-tailed alph...
标准号:AIR1678B标准名称: Uncertainty of In-Flight Thrust Determination 同源图形 相关图形
独立样本T-test条件: 1. 每一个样本相互独立没有影响 2. 样本大致符合正态分布曲线 3. 具有同方差异性 单側检验(one-tail Test)与双側检验(Two-Tail Test) 基本步骤: 1.双側检验, 条件声明 alpha值设置为0.05 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 ...
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在左侧分类栏中,“Data 1”是上面所创建的数据集,点击“New Data Table”可以创建新的数据集进行分析,“Results”下方“Unpaired t test of Data 1”表示“Data 1”的分析结果,“Graphs”下方的“Data 1”表示根据“Data 1”的分析结果绘制的图表。
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This t-distribution table provides the critical t-values for both one-tailed and two-tailed t-tests, and confidence intervals.
p-value from two-tailed t-test: p-value = 2 × cdft,d(−|tscore|) or, equivalently: p-value = 2 − 2 × cdft,d(|tscore|) However, the cdf of the t-distribution is given by a somewhat complicated formula. To find the p-value by hand, you would need to resort to stati...