Calculators for Statistical Analysis and Sample Size

On the following pages you will find several calculators which are used frequently in marketing research.

There is a sample size calculator which helps you decide how many interviews you will need to conduct. This is used in study design.

There are also several statistical calculators which test the survey results for accuracy or significant differences.

DETERMINE SAMPLE SIZE -- OR -- FIND CONFIDENCE INTERVAL

SAMPLE SIZE FOR PROPORTION

T-TEST FOR MEANS

CONFIDENCE INTERVAL FOR MEANS

CONFIDENCE ITNERVAL FOR PROPORTIONS

If you have any questions or need additional information on testing, please feel free to contact us.