erminology sampling error 抽样误差 standard error 标准误 statistical inference 统计推论 confidence interval 置信区间 hypothesis testing 假设检验 u -test u检验 t-test t-检验 significance level 显著性水平 null hypothesis 零假设,无效假设 alternative hypothesis 备择假设 statistical significance 统计学意义 two-Sided test, (two-tailed test) 双侧检验,(双尾检验) one-Sided test,(one-tailed test 单侧检验,(单尾检验) 拒绝错误Terminology sampling error 抽样误差 standard error 标准误 statistical inference 统计推论 confidence interval 置信区间 hypothesis testing 假设检验 u-test u-检验 t-test t-检验 significance level 显著性水平 null hypothesis 零假设，无效假设 alternative hypothesis 备择假设 statistical significance 统计学意义 two-sided test, (two-tailed test) 双侧检验，(双尾检验) one-sided test, (one-tailed test) 单侧检验， (单尾检验) rejection error 拒绝错误