A machine fills boxes with cereal. The labeled weight is 9 oz. The quality control department sampled three boxes every day for four days.

The samples are as follows ( You may download the table from the following Excel file to facilitate calculationX R Charts Data 7.xlsx):

Sample	Box Weights
1	9.41	9.11	9.04	8.59
2	8.88	8.7	9.19	9.39
3	8.91	9.33	8.72	9.23

The X double bar of samples is .________

The R bar of the samples is .___________

The lower control limit (LCL) of X bar chart is __________ (refer tothe table below if necessary).

The upper control limit (UCL) of R bar chart is ______________ (refer tothe table below if necessary)

(Keep two decimal points if applicable. Do not round your numbers in Excel till all the calculation is done. Then do rounding when entering answers into the blanks.)

		Factor forRChart
Number of Observations in Subgroup	Factor for x-bar Chart	Lower Control Limit	Upper Control Limit
n	A2	D3	D4
2	1.88	0.00	3.27
3	1.02	0.00	2.57
4	0.73	0.00	2.28