Chapter 13, Problem 13.84ACB

Lengths of pencils. The length measurements of 20 consecutively produced pencils arc recorded in the table below.

1. a. Construct a time series plot. Be sure to connect the plotted points and add a centerline
2. b. Which type of variation pattern in Figure 13.6 best describes the pattern shown in your plot?

Order of Production		Length (inches)
1		7.47
2		7.48
3		7.51
4		7.49
5		7.50
6		7.51
7		7.48
8		7.49
9		7.48
10		7.50
11	7.57
12	7.56
13	7.55
14	7.58
15	7.56
16	7.59
17	7.57
18	7.55
19	7.56
20	7.58