Don't study.
16 is 80% of a score
His score is 80%
Raise your score by 12%.
D+
80 percent percent = 0.008. The two tailed z-score for 0.008 is 2.652
Don't study.
16 is 80% of a score
His score is 80%
33%
z = 1.75
Raise your score by 12%.
D+
88
It is z = -0.5244
40 correct out of 120 is a score of 33.3%
84.5%