From literature it is known that the length of an E. coli bacterium is 1 μm with a standard deviation of 0.1 μm. After t
In aptitude and reasoning, quantitative reasoning dictates that ratio, percentage and series logic determine correct calculation. Therefore Treatment with chemical “X” has increased the length with a statistical confi... is correct as it meets mathematical and logical criteria, supported by mechanistic studies and conserved across related systems.
Ref: Agrawal, Quantitative Aptitude for Competitive Examinations, Chapter 5, Logical Reasoning and Probability, covers ratios, percentages, series completion, time-distance and analytical reasoning explaining problem-solving strategies for competitive assessments.