Five online training courses
For many years Ray Poynter has been offering training courses to a range of private and public organisations. Four of these courses are now being offered directly to NewMR’s contacts.
What is the right sample size for a survey?
“What is the right sample size?”, this is a question I get asked quite often. In this article, I will address the question in the context of quantitative surveys. In a separate post, I will review the same question in the context of qualitative research.
The assumptions underpinning the question
This question, “What is the right sample size for a survey?” is based on two assumptions.
If the sample size is too small, the results will be unreliable.
If enough people are sampled, the right answer will be reliably found.
Why do researchers use rating scales and why do they sometimes work?
When people buy goods or services they do not typically rate them, so why does market research use rating scales? Ray explains why and how they are used.
Partial Correlation
A short description of Partial Correlation.
Introduction to Factor Analysis
In this 2010 recording Ray Poynter provides an introduction to Factor Analysis.
Using sampling error as a measure of reliability, not validity
Last week Jeffrey Henning gave a great #NewMR lecture on how to improve the representativeness of online surveys (click here to access the slides and recordings). During the lecture he touched lightly on the topic of calculating sampling error from […]
The ITU is 100% wrong on mobile phone penetration, IMHO
The ITU (the International Telecommunication Union, the UN agency that looks after ICT – information and communication technologies) has produced a useful update on ICT facts and figures. The report is well worth reading and shows, amongst other things: As […]
Significant Digits – a key element of clearer numbers
I am in the process of writing an introductory statistics book for market researchers. This post and some of the following posts are taken from that book, in an attempt to field test the style, approach, and depth I am […]