Question

# The following are quality control data for a manufacturing process at Kensport Chemical Company. The data...

The following are quality control data for a manufacturing process at Kensport Chemical Company. The data show the temperature in degrees centigrade at five points in time during a manufacturing cycle.

Sample

x

R
1 95.72 1.0
2 95.24 0.9
3 95.18 0.7
4 95.42 0.4
5 95.46 0.5
6 95.32 1.1
7 95.40 0.9
8 95.44 0.3
9 95.08 0.2
10 95.50 0.6
11 95.80 0.6
12 95.22 0.2
13 95.58 1.3
14 95.22 0.6
15 95.04 0.8
16 95.72 1.1
17 94.82 0.6
18 95.46 0.5
19 95.60 0.4
20 95.74 0.6

A)The company is interested in using control charts to monitor the temperature of its manufacturing process. Compute the upper and lower control limits for the R chart. (Round your answers to three decimal places.)

UCL = ____

LCL = ____

B)Construct the R chart.

C) Compute the upper and lower control limits for the x chart. (Round your answers to three decimal places.)

UCL = ____

LCL = ____

D) Construct the x chart.

E)

The R chart indicates that the process variability is (in control/out of control). (no/one/two/more then two) samples fall outside the R chart control limits. The x chart indicates that the process mean is (in control/out of control). (no/one/two/more then two) samples fall outside the x chart control limits.

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