A multiple choice test consists of 50 test items. The difficulty values of items vary in a narrow range with an average value of 0.48. The test gave a variance of 81 when administered to a group of students. The reliability co efficient of the test would be :

A multiple choice test consists of 50 test items. The difficulty value

1.	A multiple choice test consists of 50 test items. The difficulty values of items vary in a narrow range with an average value of 0.48. The test gave a variance of 81 when administered to a group of students. The reliability co efficient of the test would be :
A.	0.91
B.	0.86
C.	0.78
D.	0.67
Answer» C. 0.78

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A multiple choice test consists of 50 test items. The difficulty values of items vary in a narrow range with an average value of 0.48. The test gave a variance of 81 when administered to a ​group of students. The reliability co efficient of the test would be :

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A multiple choice test consists of 50 test items. The difficulty values of items vary in a narrow range with an average value of 0.48. The test gave a variance of 81 when administered to a group of students. The reliability co efficient of the test would be :