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Basic Statistical Testing Options
Calculate the margin of error for ...
Proportions/Percentages MeansTest whether a difference is significant between two ...
Proportions/Percentages MeansOther analyses...
Chi-Square Calculation FormulaSample Size Calculators
Calculate sample size needed to achieve a desired margin of error for ...
Proportions/Percentages MeansMarketing Research Calculators
Here are some explanations of the most important formulas needed to understand research results, and marketing research calculators you can use to apply them.
Basic Statistical Testing
To understand the results of any survey questionnaire, two calculations are necessary: the margin of error and the statistical significance of any differences found. For a detailed explanation, see our marketing research resources page basic statistical testing. To view and apply some actual formulas, try the marketing research calculators in the box to the right.
Sample Size Calculator
When you know how accurate you want your data to be, and you know the size of your target population, then you need a sample size calculator to determine how big a sample you need in order to have survey results that can be projected onto the target population. For a basic explanation, see our marketing research resources page on how to use a sample size calculator. To view and apply some actual formulas, try the marketing research calculators in the box at right.
Contact us to learn more about our tools and calculators.
