ud or ud Chi-Squared or x
2
L1 or L1
L2 or L2
L3 or L3
= L4 or L4 Chi-Squared CDF or x2 CDF
< >
squared or 2
u1 or u1 u2 or u2 u3 or u3 u4 or u4 p1 or p1 p2 or p2
r squared or r2 y
α
≤
≥
≠
÷
1σ 1σ
2σ 2σ
ρ