X₁ (mm)

X₂ (mm)

Mean

393

357.6667

Variance

5809

16662.33

Observations

3

3

Pooled variance

11235.67

Hypothesized mean difference

0

Df

4

t Stat

0.408254

P(T ≤ t) one-tail

0.351998

t Critical one-tail

2.131847

P(T ≤ t) two-tail

0.703996

t critical two-tail

2.776445