Chapter 12: Concentration of an active ingredient in a liquid
detergent (grams/gallon).

Col 1: Sample number.
Col 2: Concentration xi.
Col 3: Moving range |xi-xi-1|.   
   
1     49.3       *  
2     51.1      1.8
3     47.7      3.4
4     46.9      0.8
5     48.5      1.6
6     48.4      0.1
7     50.1      1.7
8     48.2      1.9
9     48.2      0.0
10    52.2      4.0
11    53.7      1.5
12    49.9      3.8
13    51.3      1.4
14    51.0      0.3
15    52.0      1.0
16    48.7      3.3
17    50.6      1.9
18    48.2      2.4
19    53.0      4.8
20    51.7      1.3

New Data
21    44.9      6.8
22    49.3      4.4
23    46.7      2.6
24    46.8      0.1
25    49.6      2.8
26    47.8      1.8
27    42.1      5.7
28    46.7      4.6
29    46.4      0.3
30    47.2      0.8