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Sample Size

This calculator can be used to determine the minimum number of people that need to be interviewed in order to obtain results that reflect the target population... / read more

Binomial Test (for preferences)

This calculator can be used to determine respondents┬┤ preference when testing two products or services i.e. it will indicate whether there is a significant... / read more

Independent T-test

This calculator is used to compare the means of two independent groups to determine if they are significantly different from one another. It allows you to enter... / read more

Z-test for Proportions-Independent Groups

This calculator is used to compare the proportions from two independent groups (i.e. groups with no overlap between them such as men and women) to determine... / read more

Confidence Interval Calculator for Means

This calculator is used to find the confidence interval (or accuracy) of a mean given a survey’s sample size, mean and standard deviation, for a chosen... / read more

Confidence Interval Calculator for Proportions

This calculator is used to find the confidence interval (or accuracy) of a proportion given a survey┬┤s sample size and results, for a chosen confidence level.... / read more