Finally, complete the calculation for the lower control limit LCL X and enter the result in the box outlined in red below. Please round your answer to 1 decimal place.
You have now completed the calculations for all of the control lines on the chart. Add these last two lines to your printed chart and then check your version against the example version. If there are any errors, please correct them before moving on. Please note in particular that the distance from the mean on the X graph to either of the control limits should be the same. If one control limit is closer to the mean than the other then you have made a mistake somewhere.
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