by: Mike DeDad
What is/are the population(s) of interest?All adults 18 years of age of older in the United
StatesAll students in grades 9-12 in the United States
Does this sample adequately represent the population of interest? We can’t really know for sure, but they think it does
Louis Harris & Associates, Inc. completed 1,010 telephone interviews with a national cross-section of adults 18 years of age or older. Interviews of the public averaged 10 minutes in length and were conducted from Harris' facilities in Youngstown, OH, between January 22, 1999 and February 3, 1999.
A nationally representative sample of 1,085 students in grades 9 through 12 were surveyed during an English class using a self-administered questionnaire. Interviews averaged fifteen minutes in length and were conducted between January 26, 1999 and March 4, 1999.
From another Louis Harris and Associates, Inc. survey “The Louis Harris and Associates, Inc. Telephone Sample is
based on a methodology that is designed to produce representative samples of persons in telephone households in the selected geographic region. The Harris Telephone Sample makes use of random-digit selection procedures that assure sample representation of persons in both households that are "listed" in telephone directories, as well as persons in households that are "unlisted" in telephone directories.“
What type of bias would probably be of the biggest concern with this type of sampling? Non-response
What is the variable of interest? The respondents’ levels of interest in domestic or international
politics, business or finance, economics, natural history, and science.
What was, or should have been, the format of these survey questions? Closed survey questions with choices of:
very interested/somewhat interested/not interested
Categorical or Quantitative? Categorical
5. How old were you on your last birthday? ENTER NUMBER Don't Know 8 Refused 9
What is the variable of interest and what type is it? Age on his or her last birthday Quantitative if they enter
their actual ages
What is the problem with asking the question this way? It is a slightly sensitive topic
What is a better way of asking this question?
5. How old were you on your last birthday? (IF RESPONDENT HESITATES, QUICKLY GO TO Q.5A.)
ENTER NUMBER Don't Know 8 Refused 9
5a. That is, in which of the following age groups do you belong? 16 to 25 1 26 to 35 2 36 to 45 3 46 to 55 4 56 to 65 5 66 and over 6 Don't Know 8 Refused 9
How does this change the variable of interest? It is now categorical
19. Code Gender: Male 1 Female 2 IF UNCERTAIN, SIMPLY ASK WHAT IS YOUR GENDER?
What is wrong with this question? Too blunt
What would be a better way to get an answer to this? Unfortunately, there really isn’t a much better way
When is the last time you bought a candy bar from someone knocking on your door?
Within 30 days- 8%Within 90 days- 4%Within the last year- 20%Never- 68%
What is wrong with this question? Overly restrictive options
Doesn’t give the option of “more than a year ago” Most likely caused many people to answer “never” (68%)
What time of year does your group do the most fundraising? Fall - 42.4%Winter - 18.4%Spring - 10.6%Year Round - 39.1%
What is wrong with this question? Overly restrictive options
Doesn’t give the option of “summer”
How has your nonprofit's fundraising been affected by September 11th?
Hurt - 63%No Affect - 26%Helped - 11%
What is wrong with this question? Overly restrictive options
Doesn’t give the option of “I don’t know”
Describe your attitude towards fundraising.Can't wait - 50%I will if I have to - 35%Not again!- 10%Never again!- 5%
What is wrong with this question? Unbalanced Response Options
Negative responses outweigh positive (results are surprising) Possible deliberate bias Volunteer Bias
What do you do on a Friday night?
Stay in and go to bed earlyHead out with friends/significant other to eatHit the bars and party til morning
What is wrong with this question? Deliberate bias
Just because someone stays in, it doesn’t mean they have to go to bed early (implies that this is not “cool”)
Wording of the choices implies that partying is the “coolest” choice
http://www.nefsc.noaa.gov/techniques/recsurvey/chap1.html
http://www.fundsraiser.com/quizlet.html
http://www.ncee.net/cel/results.php#survey_method
http://www.quizopolis.com/what-do-you-wear-to-bed.php
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