Creative Research Systems provides a free Sample Size Calculator for survey research. You can use the survey sample size calculator to determine how many people you need to interview in order to get results that reflect the target population as precisely as needed. You can also find the level of precision you have in an existing sample.
DSS provides consulting for health plans and carriers, hospitals, other health care providers, health and wellness organizations, medical products and supplies companies, and a range of organizations in other industries across the country and the globe. Their services include research, analytics and consulting.
Sample Size: Sample size calculators allow researchers to determine the sample size needed on a study whether looking at averages or percentages, one sample or two.
Sampling Error: Once a study has been conducted, the Sampling Error calculator will indicate the sampling error for a particular confidence level.