Designing a Survey. PAF101 PAF 101 “ Did you ever see an unhappy horse? Did you ever see a bird...
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Transcript of Designing a Survey. PAF101 PAF 101 “ Did you ever see an unhappy horse? Did you ever see a bird...
Designing a Survey
PAFPAF 101101
“Did you ever see an unhappy horse? Did you ever see a bird that has the blues? One reason why birds and horses are not unhappy is because they are not trying to impress other birds and horses.”
Dale Carnegie
Module 2, Lecture 4
Chapter 3 Exercises
Take out your copy of the exercises and follow along
Finding and Serving ClientsMust be a Player
Look at Triangle
Players
Public
Policy
Societal
Problems
Client for Survey Exercise 3.1
You will need to contact a specific player who influences policy on your societal problem What the client might want to find out?What would the client do with the information?
The Chancellor Wants to Know about Do-Do on the QUAD
CENSORED
Key Concepts of Sampling
Target Population:The total specifically defined set of people about whom you want to gather information.
Sampling Frame:A subset of the population to be surveyed
Sample—those who respond Random:
Each member of the target population has an equal chance of being in the sample
Review Ex. 3.1
Look at your printout as I quickly review this exercise.
Methods of Contact
PhonePhone
Face-to-FaceFace-to-Face
MailMail
Is Your Sample Good?
Number
Percentage
Number Percentage
Lower Division Students
1800 53% 183 54%
Upper Division Students
1600 47% 155 46%
Total 3400 100% 338 100%
Target Population Sample
Review Ex. 3.2
Look through the exercise as I comment
Estimating Sample SizeRequired contacts = Desired sample size
Expected response rate
For example, if you desire a sample size of 250, and you expect a response rate of 40%, the following formula shows that you would need to contact 625 individuals:
625 = 250 .40 Public Policy Skills pg. 37-38
Explaining Confidence IntervalSample Sample
SizeSize95% 95%
Confidence Confidence IntervalInterval
30 +/- 18
50 +/- 14
70 +/- 12
90 +/- 10
140 +/- 8
200 +/- 7
350 +/- 5
700 +/- 4
1000 +/- 3
2500 +/- 2
Public Policy Skills pg. 30
Review Exercise 3.3 Here
Look through the printed exercise as I comment
Types of Questions
OpenOpen
vs.vs.
ClosedClosed