Data Analysis. Now that you understand samples and surveys, it’s time to discuss what you do with all that data you’ve collected.
What is the overall response rate? Response rates can run the gamut, so how do you know if you’ve received enough responses to make decisions based on your data?
Consider your study objective.
Do you merely want an overview of the issue? If so, a lower response rate might be sufficient to give you directional data. However, if you want to segment the data, users versus non-users for example, your response rate will need to be high enough to provide reliable numbers in your segments.
It is helpful to consider response rate in advance of data delivery, especially if you already know you’re surveying a hard-to-capture or low incidence sample. In general, a sample size less than 50 is “qualitative.” The results are useful from a directional standpoint but lack the rigor of a larger quantitative sample size.
Providing context is critical. Numbers are just numbers until you put them into a relevant context. For example, a survey question asks which brands of crackers respondents have purchased in the past month. Your brand comes up with a purchase rate of 25%. Is this good? The only way to determine if this number is one to cheer about is to look at it in context with the other brands mentioned. This may seem obvious, but data can be misleading and incorrect assumptions can be made if context isn’t part of the equation.
Statistics is a thing. We are a market research firm, so statistics are important! There are two main types of statistics to consider in survey research. These are descriptive and inferential.
- Descriptive Statistics are the “who” of the data set. These illustrate, or describe, the data. Examples of descriptive statistics include overall sample size, gender percentages, average age, etc. Descriptive statistics are the bones that inferential statistics hang on.
- Inferential Statistics allow researchers to presume, or infer, something about the study respondents. Further, if the sampling is done correctly, assumptions can be made of the population at large that the smaller sample represents. Statistical significance is a result of analysing data using inferential statistics.
Data analysis has come a long way.
Written by Stephen Walker
First published on https://www.toluna-thoughts.com