3 people were not able to correctly identify any of the sour samples which means their threshold level is beyond the concentrations used in the lab. When you analyze the data, you do not include them in the average threshold value. But, make sure you mention in the first question that you had 3 people who had threshold values beyond what we had for concentrations. Were threshold values the same for both the calculation method and the graphing method? If they were different, why do you think were they different