Chapter 15: Replicated 22 factorial experiment. Average yields
are listed first. Yields of replicates are shown in parentheses. 

Col 1: Temperature (in degrees Centigrade).
Col 2: Time (in minutes)
Col 3: Average yield (in %'s).
Col 4: Yield for run 1 (in %'s).
Col 5: Yield for run 2 (in %'s).
                
                 110   50    55.0  55.5  54.5
                 130   50    60.6  60.2  61.0
                 110   70    64.2  64.5  63.9
                 130   70    68.2  67.7  68.7