The following table contains the measurements of the key length dimension from a fuel injector. These samples of size five were taken at one-hour intervals. Use three-sigma control limits. Use Exhibit 10.13. OBSERVATIONS
SAMPLE NUMBER12345
10.4820.4960.4900.5140.474
20.4810.4970.5120.4870.516
30.5030.4950.5070.4810.528
40.5020.4970.4780.4790.495
50.4790.5010.5180.4540.485
60.4790.4970.4980.4980.502
70.5020.5120.4910.4740.501
80.5240.5320.4910.4750.486
90.5050.5260.5040.5010.504
100.5040.5090.5120.5140.488
110.5030.4780.4530.4970.483
120.4780.4660.5280.5010.518
130.5160.5120.4980.5170.501
140.4940.5170.4980.4980.507
150.5010.5120.4860.5140.511
160.4780.4970.4870.4720.528
170.4860.4810.5050.4700.487
180.5030.4900.4980.4810.487
190.5130.5340.4790.4880.496
200.5070.4910.4880.5010.512
a. Calculate the mean and range for the above samples. (Do not round intermediate calculations. Round your answers to 3 decimal places.)
Sample
NumberMeanRange
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
b. Determine X=X= and R−R−. (Do not round intermediate calculations. Round your answers to 3 decimal places.)
X=X=
R−R−
c. Determine the UCL and LCL for a -chart. (Do not round intermediate calculations. Round your answers to 3 decimal places.)
UCL
LCL
d. Determine the UCL and LCL for R-chart. (Leave no cells blank - be certain to enter "0" wherever required. Do not round intermediate calculations. Round your answers to 3 decimal places.)
UCL
LCL
What comments can you make about the process?
The process is in statistical control.
The process is out of statistical control.

steering wheels are always situated on the left side of the car.

always drive on the right side of the road.

white lines separate lanes of traffic traveling the same direction.

hashed or broken lines means you may change lanes when it is safe.

solid white lines mean stay in your lane.

yellow lines separate traffic moving in opposing directions.

hashed or broken yellow lines mean you can carefully pass, paying attention to oncoming traffic.

never cross a solid yellow line (or double yellow line).

when turning left at an intersection, pass in front of any cars that are turning left from the opposing direction (do not try to pass behind them).

use the left lane to pass other cars traveling your direction.

do not pass in the right lane unless absolutely necessary.

if you are driving in the far left hand lane and someone would like to pass you, move over to the right lane when it is safe to do so and allow them to pass.

you must always yield to pedestrians.

come to a complete stop whenever you see pedestrians trying to cross the street.

never pass a school bus if it has flashing red lights. wait until the lights have stopped.

be aware of bicyclists. often they share the road with cars and are supposed to also follow general traffic laws.

be particularly careful about driving in cities with bike lanes -- always check before turning that a bike is not coming.

it is mandatory to pull over or stop at an intersection to allow an emergency vehicle to pass you if you see one traveling with lights flashing and/or a siren running.

do not overuse your car horn. horns are used almost exclusively for emergency situations or for when you feel unsafe.

explanation:

yup the answer is

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