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