12.10 The concentration of a catalyst used in producing grouted sand is thought to affect its strength. An experiment designed to investigate the effects of three different concentrations of the catalyst utilized five specimens of grout per concentration.

The strength of a grouted sand was determined by placing the test specimen in a press and applying pressure until the specimen broke. The pressures required to break the specimens, expressed in pounds per square inch, are shown in table below:

Do the data provide sufficient evidence to indicate a difference in mean strength of the grouted sand among the three concentrations of catalyst? Test by using = 0.05.

Transcribed Image Text:

Concentration of Catalyst 35% 40% 45% 5.9 6.8 9.9 8.1 7.9 9.0 5.6 8.4 8.6 6.3 9.3 7.9 7.7 8.2 8.7