I have a dataset that includes four replicates of 7 different concentrations of pesticides applied to a plant. After exposure the number of offshoots was recorded (ranged from 0-7) and the lengthwise growth. (1) How do I go about describing trends at a significance level of P=0.05. I have already described the central tendency and variability of the data for each concentration. (2) How do I show which concentrations are significantly different (P=0.05) from the 4 control samples which had no chemical added?