Class ED-500 Introduction to Statisties Test# 2: Name: Direction: Please circle
ID: 3044044 • Letter: C
Question
Class ED-500 Introduction to Statisties Test# 2: Name: Direction: Please circle the alphabet that describe youwr finial answer to the questions below Page 16 content of the water. To test it, you take a cup and scoop some of the water out. In statistical language, the scoop of water is a: 46) You have an aquarium full of tropical salt-water fish and you need to know the exact salt A) population B parameter C)sample D) population distribution 47) A researcher conducts extensive interviews with 40 workers at a large factory in order to examine the morale among workers in general at that factory. In this example, what is the A) The 40 workers interviewed C) All the workers in the factory B) All workers in the factory except the 40 interviewed D) All the factory workers in the United States. You want to study the general amou list of students. You then put all the names into a box and have a blindfolded person select as many people as you needed. This is called: A) random selection B) haphazard selection C) specified selection D) type B selection 48) unt of drug use at your university. You obtain a complete 49) You wish to survey the interests of students in your statistics class. You enter the names of al students onto an Excel spreadsheet. You then use a computer program to generate a list of random names. This is called: A) computerized selection B) haphazard selection C) sampling selection D) random selection You want to study the physical effeets of caffeine. To recruit participants for your experiment you post a sign-up sheet for anyone willing to participate. This is an example of: 50) A) random selection B) haphazard selection C) stratified selection D) type B selection Bonus Questions: 51) If you want to know something about a population, your results would be MOST accurate if you could study the: A) entire population C) top 5% of people from the population B) subgroup from the population Dtosos fee fom he poplatio 52) The Gallup Poll correctly predieted George H. W. Bush's 1988 victory using only 4,089 interviews. Why, then, did the Gallup Poll in 1948 wrongly predict Dewey's victory over Truman when they used 50,000 interviews to make the prediction? A) They only interviewed people in one state B) They used multistage cluster sampling C) They used quota sampling D) They used random sampling Survey organizations in the United States today are not allowed to call creating some bias in the poll results. A) individuals of African American descent C) cell phones 53) B) individuals over the age of 60 D) registered voters 54) Whenever possible, researchers report the proportion of individuals approached for a study who actually participated. This is called: A) attrition rate C) approach rate B) random selection rate D) response rateExplanation / Answer
46. Sample .
47. The 40 workers interviewed , because we dont know how many workers are there in ghe factory in total.
48. Random selection.
49. Sampling selection
51. Subgroups of population.