... Vocabulary C.B- 7 0- 71 P.F- 324 220 8 Listening- Reading C.B- 7 2-7 3220 8 Language review- Skills C.B. 7 3-7 5 P.F- 335 220 8 Case study C.B- 7 6-7 7 P.F. 3 4-3 5220 8 Text bank- talk business T.B. 12 8- Grammar ... difficulty. The KD- 21 is as follows: n x – x 2/nRtt = ( 1 - ) (Henning, 19 87) ( n -1 ) st2Rtt : The KR 20 reliability estimaten: The number of items in the test x: The mean of scores on the test ... that the MCQs test 1 does not yeild a reliable result. The unreliability of the test resulted from the performance of both test- takers and test- designers. As for test designers, they test score...