If the error margin in an analytical study is 20 %. What is the region of accuracy?
A) 10%
B) 20%
C) 80%
D) 90%
D) 90%
The region of accuracy in an analytical study is determined by subtracting the error margin from 100%. In this case, the error margin is 20%, so the region of accuracy is 100% - 20% = 80%.
Therefore, the correct answer is C) 80%.