This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Precision & Accuracy, Subject name: Social & Preventive Medicine
All of the following are test for degree of closeness of a measured/ calculated quantity to its actual/ true value except:- 
Select and explain. 
A. Mean cha, B. Levy Jennings (LJ) cha, C. Range cha, D. Shewha control cha
C: Range cha
Answer: C: Range cha 
Explanation: Precision Accuracy Definition Repeatability, reliability, consistency, reproducibility of a test Degree of closeness of a measured/ calculated quantity to its actual/ true value, validity Tests used to measure Range cha, R - cha Mean cha, Levy Jennings cha, Shewha control cha