Question

A lumber company makes plywood for residential and commercial construction. Every hour, five pieces of plywood are selected and the thicknesses are measured. The accompanying graphs are the control charts for the first 20 subgroup Suppose this process remained in control for the next 40 hours. The accompanying data are the thickness measurements for hours 41 through 43. Based on these data and the two control charts, what should be concluded about the pro Has the process gone out of control? B Click the icon to view the plywood thickness data. Control Charts Click the icon to view the control charts for the first 20 subgroups. Determine the subgroup means and ranges for hours 41 through 43. x Bar Chart Q Hour Mean Range 92- 41 Q 0 Plywood Thicknesses ).78- UCL = 0.7957 42 n 7.74 MA ma 2 CL = 0.753 43 1 (Type integer or decimals.) 07- LCL = 0.7103 .86- D 2 4 6 9 10 12 14 16 19 20 Samala Hour Hour 41 42 43 Panel 1 0.761 0.766 0.812 Panel 2 Panel 3 Panel 4 0.737 0.723 0.718 0.785 0.777 0.789 0.774 0.769 0.799 Panel 5 0.751 0.796 0.822 R Chart 0.2- Print Done UCL = 0.1564 0.1-1 CL = 0.074 nam 1.05- LCL = 0,00 °12'' 10 12 14 16 18 20 Sample Hour

Answer 1

Hlour I Mean 0 42 43 (0.761 +0.737+ 0.723+0.718+0.751)/5 = 10.738 (0.766 P 0.785+0.777 +0.789 +0.796)75 = 0.7826 (0.812 +0.774 +0.769 +0.799+ 0.822)/5 0.7952 Hour Range 0.761-0.78=0.043 41 42 0.796-0.766 -0.03 43 0.822-0.769 = 0.053 Range Mean Any Hour 0.043 0.738 41 42 0.03 0.7826 43 0.7952 Or 053