Question $7$

The administrator of a small town received a certain number of complaints during the last two weeks. What are the three sigma

control limits for the number of complaints received each day using the following data? Is the process in control?

UCL$=19\mathrm{.}11,LCL=0\mathrm{.}38$ and in control.

UCL$=17\mathrm{.}45,LCL=0$ and in control.

UCL$=17\mathrm{.}43,LCL=-0\mathrm{.}18$ and in control.

UCL$=17\mathrm{.}43,LCL=-0\mathrm{.}18$ and NOT in control.

None of the above.