Chapter 12:  The PH value of 15 shampoo batches.

Col 1: Batch number
Col 2: PH value

1    6.04           
2    6.01     
3    5.81          
4    5.95          
5    6.12
6    6.04           
7    6.13      
8    6.17      
9    6.28      
10   6.11 
11   6.16
12   5.87
13   6.15
14   5.86
15   6.06