[過去ﾛｸﾞ] 面白い問題おしえて〜な 28問目 (1002ﾚｽ)
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448: 2018/11/27(火)14:22 ID:Lp6axtvL(2/4) AAS
>>444
> kinyu=scale(rnorm(100))*70+600
> seizo=scale(rnorm(100))*70+570
> t.test(kinyu,seizo,var.equal = TRUE)

Two Sample t-test

data: kinyu and seizo
t = 3.0305, df = 198, p-value = 0.002768
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
10.47802 49.52198
sample estimates:
mean of x mean of y
600 570

> t.test(kinyu,seizo,var.equal = TRUE,alt='greater')

Two Sample t-test

data: kinyu and seizo
t = 3.0305, df = 198, p-value = 0.001384
alternative hypothesis: true difference in means is greater than 0
95 percent confidence interval:
13.64024 Inf
sample estimates:
mean of x mean of y
600 570

答は　A

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