Anova on data expressed as a ratio/% of control
Posted 16 July 2012 - 03:22 PM
I have several sets of data, each from a different individual. I was investigating the cell response to various treatments. Each set contained a control, and several treatment groups. Since the control response was variable, I normalised individual responses by expressing effects as a percentage change from control - set to 100%.
I would like to compare these groups but I'm not sure how. Firstly, how do I calculate the error of group means? and since the control means have been normalised, how do I express the error of control? Can I use anova or is this not right?
Your help is much appreciated
Posted 20 July 2012 - 05:20 PM
Posted 20 July 2012 - 05:58 PM
Animal 1 - assayed in triplicate
mean control - 50 = 100%
mean treatment1 - 40 = 80%
mean treatment2 - 45 = 90%
Animal 2 - assayed in triplicate
mean control - 40 = 100%
mean treatment1 - 35 = 88%
mean treatment2 - 30 = 75%
Mean of means
Control - mean = 100%, SEM =?
Treatment 1 - mean = 84%, SEM = 4
Treatment 2 - mean = 83%, SEM = 7.5
Could somebody please help me,