Question: PLEASE SHOW WORK SO I UNDERSTAND THIS: I am interested in looking at the MPG for different brands of cars to see if they are

PLEASE SHOW WORK SO I UNDERSTAND THIS:

I am interested in looking at the MPG for different brands of cars to see if they are consistently the same. Random samples of size ten were taken and produced the following data:

Sample

Average

Range

1

26.2

13.54

2

33.3

6.22

3

36.5

6.35

a. Find the UCL for the R chart.

b. Find the LCL for the R chart.

c. Is this chart in control? Why/why not?

d. Find the UCL for thex-chart

e. Find the LCL for thex-chart

f. Is this process in control? Why/why not?

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