Math 227 Homework#1 Fall2009 ------Part I. Determine which of the four levels of measurement is most appropriate: Qualitative or Quantitative? 1. Weight of students in this class.
2. Ratings of good, average, poor for today lecture.
3. Current temperatures of this class room.
4. Numbers on the Laker’s basketball players.
5. The year of student’s birth day.
6. Drivers license numbers.
7. The numbers of “yes” responses received when 1000 people are asked if they are going
to vote for OBAMA.
8. Area Codes of students in this class
Part II. Determine whether the given values are from a discrete or continuous data set.
9. Kate obtains a sample data and finds that the mean GPA of student is 2.78.
10. Ina survey of 1,011 adults, it is found that 32% of them have guns in their homes (based on a Harris Poll).
11. When 20,121 baseballs were tested, it was found that 957 of them were defective.
12. The average of the first test on Statistics class was 78.
Part III. Determine which of the four levels of measurement is most appropriate: nominal, ordinal, interval, or ratio.
13. Weight of students in this class.
14. Ratings of good, average, poor for today lecture.
15. Current temperatures of this class room.
1 16. Numbers on the Laker’s basketball players.
17. The year of student’s birth day.
18. Drivers license numbers.
19. The numbers of “yes” responses received when 1000 people are asked if they are going
to vote for OBAMA.
20. Area Codes of students in this class
21. Social Security of students in this class
22. Phone numbers of students in this class
23. Professor’s time walking into the class room
Part IV. Identify which of these types of sampling is used: Random (SRS), Systematic, Stratified, Cluster, or Convenience.
24. An Los Angeles Times reporter gets a reaction to a breaking story by poling people as they pass the front of the Times building.
25. Dr. Ghamsary has randomly selected 5 students in his class.
26. CNN’s polls from viewers showed Obama is ahead of Clinton by 3%.
27. The Orange County Commissioner of Jurors obtains a list of 55,014 car owners and constructs a poll of jurors by selecting every 50th name on the list.
28. In a Harris poll of 1,011 adults, the interview subjects were selected by using a computer to randomly generate telephone numbers that were then called.
29. A Ford Motor Company researcher has partitioned all registered cars into categories of compact, mid-size, and family-size. He is surveying 75 car owners from each category.
30. Motivated by a student who died from binge drinking, Chico State conducts a study of student drinking by randomly selecting 10 different classes and interviewing all of the students in each of those classes.
31. A marketing executive for Ford Motor Company finds that its public relations department has just printed envelopes with the names and addresses of all F-150 owners. She wants
2 to do a pilot test of a new marketing strategy, so she thoroughly mixes all of the envelopes in a bin, and then obtains a sample group by pulling 50 of those envelopes.
32. A news reporter was an observer at a police sobriety checkpoint at which every 5th driver was stopped and interviewed.
33. CNN is planning an exit poll in which 100 polling stations in Southern California will be randomly selected and all voters will be interviewed as they leave the premises after the November 2004 election.
34. An economics student is studying the effects of education on property ownership and conducts a survey of 150 randomly selected homeowners from each of these categories: less than a high-school degree; high-school degree; more than a high-school degree.
35. A statistics student obtains height/weight data by interviewing the members of his fraternity.
36. A UCLA researcher surveys all cardiac patients in each of 30 randomly selected hospitals.
37. A marketing expert for ABC is planning a survey in which 525 people are randomly selected from each age group of 18-24, 25-39, 40-55, and 55 and older.
38. Dr. Ghamsary randomly selected 3 students from left and 3 students from right side of his class to help him for grading homework.
39. IRS decided to pick about 5000 audits from each 50 states in America.
40. Long Beach Memorial hospital is randomly asking from each floor to see if patients are satisfied with the care is given by nurses at night time shifts.
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