Kurtosis

• Denotes degree of flatness or peakness of a curve of a given frequency distribution.

1. Mesokurtic curve

K = 0.263 , β₂ = 3 , λ_2­ = 0

2. leptokurtic curve

K > 0.263 , β₂ > 3 , λ_2­ > 0

3. Platykurtic curve

K < 0.263 , β₂ < 3 , λ_2­ < 0