⚙ Test setup
One
Two
Paired
Sample size n
20
True mean μ
52
Null H₀ μ₀
Std dev σ
8
Significance α
0.05
0.01
0.10
Size A n₁
20
Size B n₂
20
Mean A μ₁
52
Mean B μ₂
48
Std dev σ
8
Significance α
0.05
0.01
0.10
Equal variances (pooled)
Pair count n
15
Mean diff δ
4
Std of diffs σ_d
8
Significance α
0.05
0.01
0.10
💊 Drug trial
📚 Learning
∅ Null true
⚠ Small n
—
t statistic
—
df
—
p-value
—
Cohen's d
—
95% CI
—
Power (1−β)
—