2:41 PM Thu May 5 6. A psychologist is studying the sleep patterns of the 3960 students at her university. She decides to start by asking a random sample of 30 students how many hours of sleep they get weekday nights. Identify the type of sample in each of the following survey methods. Justify and explain your answers. (4 marks, K; 4 marks, C) a) The psychologist assigns each student a number from 1 to 3960. She selects the sample by randomly choosing one of the first 132 numbers and every 132nd number thereafter. L; lit-It\": stage b) The psychologist assigns each student a number from 0001 to 3960 and uses a computer to randomly generate a list of 30 numbers to select the students for the sample. '6 Syskudk MDM4U, Test #1 Page1 c) Students are listed by the neighbourhood they live in. The psychologist randomly selects six neighbourhoods and then randomly selects ve students from each one. \"under\" Sample d) An equal proportion of students are randomly selected from each discipline. Sm: r: ed