Cronbach.jl

Cronbach's alpha in Julia.

julia> using Cronbach

julia> C = [10  6  6  6;  # fictitious data
             6 11  6  6;
             6  6 12  6;
             6  6  6 13];

julia> cronbach(C)
0.8135593220338984

See the complete API below:

Cronbach.cronbach

Cronbach.cronbach — Method

cronbach(Σ::AbstractMatrix)

Calculate Cronbach's alpha. This is also known as tau-equivalent reliability ($\rho_T$). Σ is a covariance matrix (which means it must be square).

Examples

julia> C = [10  6  6  6;  # fictitious data
             6 11  6  6;
             6  6 12  6;
             6  6  6 13];

julia> cronbach(C)
0.8135593220338984

source