5.5.2 方案

    1. x has 10 elements:
    2.  [1] 10.585529 10.709466  9.890697  9.546503 10.605887  8.182044 10.630099  9.723816
    3.  [9]  9.715840  9.080678
    4. y = 10.88375 12.81731 11.37063 11.52022 10.24947 11.8169 10.11364 10.66842 12.12071 11.29872
    5. T-test between x and y
    6. =============================
    8.     Welch Two Sample t-test
    10. data:  x and y
    11. alternative hypothesis: true difference in means is not equal to 0
    12. 95 percent confidence interval:
    13.  -2.196802 -0.641042
    14. sample estimates:
    15. mean of x mean of y
    16.  9.867056 11.285978
    17. Some more stuff here...