There are 18 students, three (disjnct) students each from 6 different high schools. there are 6 admissions officers, one from each of 6 colleges. each of the officers successively picks a subset of three of the 18 students to go to their college (once a student is chosen, another college cannot chose her later). how many ways are there to do this so that no officer picks 3 students from the same high

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables