Sample Size Is Important

Written by PortMA

Sample Size Is Important

Sample size mattersAsking consumers to participate in a short set of questions after an amazing event where they have just experienced the best product they have ever come in contact with (yours) can be a downer sometimes. Why can’t we just have a great time with our consumer, show them we love them, hand them some great free stuff and let them go on their way to be our most loyal customers the rest of our lives? But it’s incredibly important to participate!

Why sample size matters

At PortMA, we use the data collected during an event to provide recommendations to our clients on how to make a great event even better. We need statistical significance to do this, and you can only get that from a solid sample size.
The bigger the better, because the more responses we have, the more confidence we have that the recommendations we are providing for our clients are not only accurate, but can be applied to a broader population.

What is a strong sample size in experiential measurement?

At PortMA, we like to work with a sample size of at least 350 to 400 surveys per market, venue type, time frame or any-way-you-want-to-split-it segment, as a minimum.
Why that number? Because it not only allows our teams to generalize the overall results with a comfortable level of confidence, but it also lets us provide insights and direction on specific sub-segments within the any-way-you-want-to-split-it segment.

  • Want to know how women in California are responding to your new brand of organic baby food compared to women in Texas? With 350 responses in each market, we can tell you!
  • Want to know how males, 25 – 35 years old, like your brand of razors compared to males in other age groups? With 350 male responses, we can do that.

I don’t want the 350 per segment rule to be a definitive limit. With data, more is better! Just know that we can get you where you want to be with at least 350 responses from your loyal customer base.


The next time your friendly PortMA research manager recommends a sample size per segment for your next research project, I can promise you now it didn’t come from the fortune cookie they got with their lunch.
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