Factors P statistic
Primary Particle 0.000331
Surface 0.024
Sodium stearate 6.68×10-5
Sodium Bicarbonate 0.00936
Additive Concentration (5% w/w) 1.42×10-5
Angle 7.2×10-6
Standard Deviation 0.0724
A P statistic less that 0.05 implies statistical significance at 95% level of confidence. All factors except standard deviation in the data exert statistical significance on the percentage charge reduction.
Table 4: Statistical analysis of data using dummy variable methodology.