Chapter 13:  Thickness of chrome (Cr) and gold (Au) deposits for
28 subgroups of size two.
Specification limits for chrome are 6 and 12; specification
limits for gold are 25 and 41.

Col 1: Date.
Col 2: Sample 1 - Cr.
Col 3: Sample 1 - Au.
Col 4: Sample 2 - Cr.
Col 5: Sample 2 - Au.
         
March 20   11.2  35.0     8.6  30.5
March 21    9.1  32.5     9.6  31.5
March 21    9.6  33.0     7.6  33.0
March 21    9.6  34.0     9.6  32.0
March 22    8.6  36.5     9.6  31.0
March 22    8.1  34.5     9.6  33.5
March 22    6.6  32.0    10.2  34.0
March 23    7.1  31.0    10.2  32.0
March 27    9.6  34.0    10.2  31.5
March 28   10.2  33.0    10.2  32.0
March 29   10.2  33.0     9.6  34.0
April 2    10.2  33.5    11.2  33.0
April 3     9.6  32.0    10.2  30.0
April 4    10.2  33.0     9.6  33.5
April 4    10.7  33.5    11.2  35.0   
April 4     7.6  30.5     8.6  25.4
April 5    10.5  34.0     6.5  34.5 
April 5    12.2  30.5    10.2  32.0
April 6     7.6  33.5     9.6  35.0
April 6    10.2  32.0     6.6  33.0
April 9    10.2  35.0    10.2  34.0
April 9    10.2  34.5    10.2  33.0
April 9    10.2  32.5     9.1  33.0
April 9    10.2  34.0     9.1  32.0
April 10    9.6  34.0     9.1  32.0
April 10   10.2  32.0     8.6  30.5
April 11    9.1  32.5    11.2  34.5
April 11    7.6  33.0     9.6  33.0