In a college of 10,000 students (4,500 males and 5,500 females) a researcher wants 100 students in a sample. Determine if the sampling method is simple random, random but not simple random, or neither.
(a) The students are given numbers between 1 and 10,000. Then, 100 numbers are randomly selected
(by computer) and those 100 persons are in the sample.
(b) The researcher randomly selects 45 males and 55 females for the sample.
(c) The researcher randomly selects 50 males and 50 females.