Two student researchers have been asked to do a survey to determine the attitudes of students toward fraternities and so

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Two Student Researchers Have Been Asked To Do A Survey To Determine The Attitudes Of Students Toward Fraternities And So 1 (79.97 KiB) Viewed 388 times

Two student researchers have been asked to do a survey to determine the attitudes of students toward fraternities and sororities on campus. There are 3,200 students in the school. About 25% of the students belong to the Turkish organizations and 75% do not. The two student researchers disagree about what sampling plan is best for the study. One researcher thinks they should draw a stratifi ed random sample of 200 students: 100 from among those students who belong to Turkish organizations and 100 from among the independent students. The second researcher thinks they should draw one simple random sample of 100 students from the campus as a whole. Q1. Comment critically on these two sampling plans in terms of their representativeness and the likelihood that they would measure reliably the views of students who belong to Turkish organizations. In this exercise you will need a deck of cards. Set aside the face cards (Jack, Queen, King) and use the cards 1-10 (assign a value of one to the Aces). Shuffle the cards well. In order to get a feel for how random assignment to conditions works to create equivalent groups, deal the shuffl ed (randomized) cards into two piles, each with 20 cards. One pile will represent "participants" randomly assigned to an experimental condition and the second pile will represent participants randomly assigned to a control condition. Assume the value on each card indicates participants' score (1-10) on an individual differences measure, such as memory ability. Q2. Compute a mean score for participants in each condition (pile) by summing the value on each card and dividing by 20. Are the two groups equivalent in terms of their average memory ability? To understand the problems associated with selective subject loss, assume that participants with low memory ability (values of 1 and 2) are unable to complete an experimental task and drop out of the experimental condition. To simulate this, remove cards with values of 1 and 2 from the pile that represents your experimental condition.