相关组总体均值差异的估计 Estimates of differences in the population means of the relevant groups
1.求出两总体均值的点估计 \\Find a point estimate of the two population means:
2.用标准误估计差异样本均值的方差 \\Use the standard error to estimate the difference of sample means:
=
3.求出枢轴量 Calculate the pivot quantity:
4.根据置信区间求出t的临界值t0。
\\Find the critical value of t according to the confidence interval
5.根据式子:
求出置信区间
\\Find the confidence interval.