$194$ points

The MSE $($mean squared error$)$ of a forecasting technique for the last few periods is $9\mathrm{.}61.$ What is the control limits for the forecast errors? $($UCL: upper control limit; LCL:

lower control limit$)$

UCL$=+9\mathrm{.}61,LCL=-9\mathrm{.}61$

UCL$=+9\mathrm{.}3,LCL=-9\mathrm{.}3$

UCL$=+9\mathrm{.}61,LCL=0$

UCL$=+4\mathrm{.}81,LCL=-4\mathrm{.}81$

UCL$=+9\mathrm{.}3,LCL=0$