Statistics for Uses of Greek Letter in Science and Mathematics

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Use	Greek Letter	% Correct
Circumference : Diameter	Pi	88%
Summation	Sigma	80%
Wavelength	Lambda	65%
Angle	Theta	65%
Symbol for "Micro" Suffix	Mu	59%
Difference	Delta	56%
Nucleus of Helium-4	Alpha	49%
Highest Penetrating Ray	Gamma	49%
Density	Rho	49%
Coefficient of Friction	Mu	47%
Golden Ratio	Phi	44%
Angular Velocity	Omega	41%
Wave Function	Psi	31%
Type of Statistics Distribution (Use with Square)	Chi	29%
Small Positive Quantity	Epsilon	26%
Circumference : Radius	Tau	26%
Chemical Bond Formed by Head-to-head Overlapping	Sigma	21%
Carbon Atom Next to the Carbonyl Carbon	Alpha	18%