母集団が2つの場合の母分散の推定と検定

r_var-test

var.test

Performs an F test to compare the variances of two samples from normal populations.

See Also ...

MAXIMA :: test_variance_ratio

母集団が2つの場合の母分散の推定と検定

$$A:16.0,16.1,23.5,20.0,16.5,12.2,19.9,18.2,19.2,24.7$$

$$B:20.9,20.4,21.5,20.6,22.1,21.6,23.3,18.9,19.2$$

$$\mathrm{点}\mathrm{推}\mathrm{定}：7.21$$

$$\mathrm{区}\mathrm{間}\mathrm{推}\mathrm{定}：(1.6532,48.2207)$$

$$F_0=\frac{V_A}{V_B}=7.21$$

$$>F({\phi }_A,{\phi }_B,\alpha /2)=F(n_A-1,n_B-1,\alpha /2)=F(9,8,0.025)=4.36$$

AとBではばらつきが異なると判定される。