What is the value of the statistic to be plotted on the standardized c-chart which is designed to run in the short production?

(Z_i= frac{c_i- bar{c}}{ sqrt{ bar{c}}} )

(Z_i= frac{c_i+2 bar{c}}{ sqrt{ bar{c}}} )

(Z_i= frac{c_i-2 bar{c}}{ sqrt{ bar{c}}} )

(Z_i= frac{c_i- bar{c}}{ sqrt{ bar{c}}} )

(Z_i= frac{c_i+ bar{c}}{ sqrt{ bar{c}}} )

What is the value of the statistic to be plotted on the standardized c

1.	What is the value of the statistic to be plotted on the standardized c-chart which is designed to run in the short production?
A.	(Z_i= frac{c_i+2 bar{c}}{ sqrt{ bar{c}}} )
B.	(Z_i= frac{c_i-2 bar{c}}{ sqrt{ bar{c}}} )
C.	(Z_i= frac{c_i- bar{c}}{ sqrt{ bar{c}}} )
D.	(Z_i= frac{c_i+ bar{c}}{ sqrt{ bar{c}}} )
Answer» C. (Z_i= frac{c_i- bar{c}}{ sqrt{ bar{c}}} )