Parameters

T₁

T₂

Mean

428.67

455.925

Variance

32,456.37

22,498.27

Observations

20

20

df

19

t Stat

−4.0329

P (T ≤ t) one-tail

0.000355

t Critical one-tail

1.729133

P (T ≤ t) two-tail

0.000711

t Critical two-tail

2.093024