After watching an advertisement for hand sanitizer on television, ben decided to see just how effective the advertised hand sanitizer really was. ben used warm water as his control. he compared the advertised sanitizer with two brands of hand soap. in all four trials he rubbed his hands together for two minutes. after using the three products and the control, he cultured the bacteria on his hands. he recorded the number of bacterial cultures that appeared on each culture plate. ben's results can be seen in the data table. ben concluded that both brands of soap were more effective in killing bacteria than the advertised hand sanitizer. what term best describes ben's results for all four trials? a) biased b) inconclusive c) qualitative d) quantitative