1.
How to Analyse a Survey:
The OneThingYou Need to Know!
Lee Baker
Chi-Squared Innovations
lee.baker@chi2innovations.com

2.
Survey
 A survey is a research method used for
collecting data to gain information and insights
on a particular topic of interest

3.
2Types of Survey
Survey
Cross-Sectional Longitudinal

4.
Cross-Sectional Survey
 Used to study a topic of interest at a specific
point in time
› We use these studies to get a quick & cheap
summary

5.
Cross-Sectional Survey – Example
 Do you have lung cancer?
› Yes
› No

6.
Yes No
Men 10 50
Women 15 25
0
10
20
30
40
50
60
%
Descriptive
stats

7.
Longitudinal Survey
 Used to study a topic of interest over a period of
time
› We use these studies to examine cause and effect

8.
Cause Effect
 For how long have you
smoked?
› Non-smoker
› Less than 10 years
› More than 10 years
 Do you have lung
cancer?
› Yes
› No

9.
0
5
10
15
20
25
30
35
Never Smoked < 10Years > 10Years
Lung Cancer Linear (Lung Cancer)
A trend!

10.
2Types of Longitudinal Survey
Longitudinal
Case Control Cohort

11.
Case Control Survey
Outcome
Present
Outcome
Not Present
Compare
Case Control
Outcome:
• Disease
• Sale
•Opinion

12.
Outcome
Present
Cause
Present
Cause
Not Present
Outcome
Not Present
Cause
Present
Cause
Not Present
Compare
Time

13.
Cohort Survey
Cause
Present
Cause
Not Present
Compare
Case Control
Cause:
• Smoking
• Product placement
•Advert

14.
Cause
Present
Outcome
Present
Outcome
Not Present
Cause
Not Present
Outcome
Present
Outcome
Not Present
Compare
Time

15.
2Types of Cohort Survey
Cohort
Retrospective Prospective

16.
Retrospective Survey
 Check back into existing records to investigate
cause & effect
› Looking backwards into the past

17.
Prospective Survey
 Investigate cause and effect over time
› Looking forwards into the future

18.
DifferentTypes of Survey
Survey
Cross-Sectional
(summary)
Longitudinal
(cause & effect)
Case Control
(cause)
Cohort
(effect)
Retrospective
(past)
Prospective
(future)

19.
Most Importantly !!!
 Whatever type of survey you’re conducting
› The way you analyse them all is EXACTLY the same
 Same types of data
 Same descriptive statistics
 Same data analysis techniques
 Same statistical tests

20.
Thank You
Get more kick ass data ninja skills here:
(ExclusiveVideoCourse – Start FREE!)
http://bit.ly/HACSDERSS