Table 6. Computed Results of the Covariance of the Alternate Forms (X1, X2, X3 and Form Y)

From

Parallelism of Test Items: Estimating the Means (µ), Variances (σ2) and Covariances (Cσ2) of Alternate Test Forms

Simon Ntumi, Sheilla Agbenyo, Tapela Bulala

International Journal of Data Envelopment Analysis and *Operations Research*. 2022, 3(1), 1-7