Urgent

The Money Pit Mortgage Company is interested in monitoring the performance of the mortgage process. Fifteen samples of five completed mortgage transactions each were taken during a period when the process was believed to be in control. The times to complete the transactions were measured. The means and ranges of the mortgage process transaction times, measured in days, are as follows:

Sample	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Mean	13	11	5	14	9	9	12	13	10	11	14	6	8	6	9
Range	8	13	6	10	11	16	14	17	12	12	12	8	11	13	15

Subsequently, samples of size 5 were taken from the process every week for the next 10 weeks. The times were measured and the following results obtained:

Sample	16	17	18	19	20	21	22	23	24	25
Mean	8	11	6	12	14	16	10	19	17	15
Range	9	13	8	6	14	16	13	12	10	8

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Click the icon to view the table of factors for calculating three-sigma limits for the

x-chart

and R-chart.

a. Construct the control charts for the mean and the range, using the original 15 samples.

Set up the R-chart by specifying the center line and three-sigma control limits below. (Enter your responses rounded to two decimal places.)

R-chart
UCLR	=
R	=
LCLR	=