29.
例えば、統計学的検定で白黒つけることもできる
29
> t.test(d[1:15],d[16:30])
Welch Two Sample t-test data: d[1:15] and d[16:30]
t = -2.6278, df = 27.8, p-value = 0.01383
alternative hypothesis: true difference in means is
not equal to 0 95 percent confidence interval: -
0.17645650 -0.02183668 sample estimates: mean of x
mean of y 0.4788178 0.5779644
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