Introduction > Step-by-Step Statistics > Analysing Your Data > Raw Data

Raw Data Pea seedlings treated with high concentrations of amino-levulinic acid, ALA, (which is pre-cursor of chlorophyll), produced an average of 12 new roots per plant, whereas control plants that weren't treated produced an average of 16 new roots per plant.  Can you say with confidence that this difference in root number is because of the experimental treatment? In the above example, although the average number of roots produced by the treated plants was 12, some plants produced as few as 6 roots and some as many as 18 roots. Without applying statistical analyses, you cannot state with confidence that application of ALA has a detrimental effect on root production?

<<< Previous Page >>><<< Next Page >>>