n = 36.15441
delta = 0.773034
sd = 1
sig.level = 0.05
power = 0.9
alternative = two.sided
NOTE: n is number in *each* group
> t.test(drcs$xinyue,drcs$none)
Welch Two Sample t-test
data: drcs$xinyue and drcs$none
t = -0.71829, df = 75.999, p-value = 0.4748
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
-1.1608659 0.5454813
sample estimates:
mean of x mean of y
9.564103 9.871795
简单说每组39样本大概可以检测出大于均数15%的提升,新月-35的电伤至可以提升17.5dps。 但是P没有统计意义,就是说-135的电抗和-100的电抗带来相同的dps。换句话说电抗降低-100后不再收益,既然冰电最低-100可以推论火毒也是-100。