If the kai square distribution that we care about falls into this rejection region, then we reject our null hypothesis but our kai square statistic is only 2.53 so it is sitting some place right over here. so its actually not that crazy to get it if you assume the null hypothesis. so based on the data we have right now, we cant reject the null hypothesis. we dont know for fact that the herbs do nothing but we cant say that they do something. so we are not going to reject it.but from this point of view , it doesnt seem like the herbs are different from each other and one of the herbs is obviously a placebo. 