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Table 5 Descriptive statistics of the estimated item difficulty

From: Integrating automatic question generation with computerised adaptive test

 

P(CTT)

 

QS_A

QS_B

QS_C

QS_D

QS_E

QS_F

n

32

32

32

32

32

32

x̄

.507

.509

.460

.454

.507

.434

sd

.091

.095

.083

.098

.089

.085

max

.687

.687

.562

.625

.656

.594

min

.375

.312

.219

.281

.312

.312

r with b (IRT)

.789

.782

.830

.840

.891

.816