- StudyBlue
- Louisiana
- Tulane University
- Marketing
- Marketing 420 01
- Hailey
- CHAPTER 13: COLLECTING THE DATA ? FIELD PROCEDURES AND NONSAMPLING ERRORUntitled Flashcards
CHAPTER 13: COLLECTING THE DATA ? FIELD PROCEDURES AND NONSAMPLING ERRORUntitled Flashcards
Marketing 420 01 with Hailey at Tulane University
About this deck
By: Max Davis
Created: 2011-11-30
Size: 15 flashcards
Views: 1
Created: 2011-11-30
Size: 15 flashcards
Views: 1
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy
Sign up (free) to study this.
Sampling error
difference between the statistic and the values expected over many repetitions of sampling
Non-sampling error
reflect many other kinds of error that arise in research. Types:
- Non-observation error: we’ve neglected parts of the survey population (they were accidently not included or they did not respond)
- Observation error: when we get data from the sample but the info is inaccurateNon-observation errors: non-coverage and non-response errors
Non-coverage errors
sampling frame issue: failure to include some units or entire sections of the defined survey population in the sampling frame.
Methods for handling non-coverage errors
o Improve basic sampling frame using other sources o Select sample in a way that reduces incidences such as by ignoring ineligibles on a list o Adjust the results by appropriately weighting the subsample results (ex: how many x do you own: 1, 2, 3 weighting accordingly to equalize response values)
Non-response errors
can’t/don’t respond: failure to obtain information from some elements of the population that were selected for the sample.
not at homes (non-response)
Not at homes: designated respondent is not home when the interviewer calls o Methods for handling: § Have interviewers make advance appointments § Call back at another time preferably at a different time of day § Attempt to contact the designated respondent using another approach (ex: use a modified callback)
refusals (non-response)
- Refusals: respondent refuses to cooperate in the survey o Methods for handling: § Attempt to convince respondents of the value of the research and the importance of their participation § Provide advance notice that the survey is coming § Guarantee anonymity
methods continued
§ Provide an incentive for participating § Hide the identity of the sponsor by using an independent research organization § Try getting the respondent to comply with a small task before getting the survey § Use personalized cover letters § Use a follow-up contact at a more convenient time § Avoid interesting, but not vital questions § Adjust the results to account for the non-response
OBSERVATION ERRORS
Field errors/data collection errors: when the individual participates in the study, he or she refuses to answer specific questions or provides incorrect answers to them
Interviewer/interviewee biases
o Background: age, education, socioeconomic status, ethnicity, religion, gender, etc. o Psychological factors: perceptions, attitudes, expectations, motives, etc. o Behavioral factors: mistakes made in asking questions, probing, recording, etc
methods for handling biases
o Closely match the background characteristics of the interviewer and respondent o Make sure interviewer instructions are clear and written down o Conduct practice training sessions with interviewers
m f h b continued
o Examine interviewer’s understanding of the study’s purposes and procedures o Have interviewers complete the questionnaire and examine the replies they secure to see if there is any relationship o Verify a sample of each interviewer’s interviews
Office errors: errors that arise when coding, tabulating, analyzing the data
Methods of handling:
oe cont.
o Use closed questions to simplify the coding, but when open-ended questions need to be used, specify the appropriate codes that will be allowed before collecting the data o When open-ended questions are being coded and multiple coders are being used, divide the task by questions and not by data collection forms o Have each coder code a sample of the other’s work to ensure a consistent set of coding criteria is being employed
again
o Follow established conventions when coding the data for computer analysis (ex: use numeric codes and not letters of the alphabet) o Have a codebook that lists codes for each variable and categories included in each code Use appropriate methods to analyze the data
About this deck
By: Max Davis
Created: 2011-11-30
Size: 15 flashcards
Views: 1
Created: 2011-11-30
Size: 15 flashcards
Views: 1
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy