Calculating the sample size is an essential part of any statistical analysis or research project. If you are a researcher looking to find the right sample size for your study, Microsoft Excel can be a ...

The first step in using this formula is finding the Z-score based on your desired confidence level. You can use an online Z-score table or refer to Excel’s built-in NORM.S.INV() function. To find the ...

What is stratified random sampling? Stratified random sampling is the technique of breaking the population of interest into groups (called strata) and selecting a random sample from within each of ...

The starting sample size you need to achieve the desired number of completed CAHPS questionnaires for analysis and reporting should take several factors into account: The accuracy of the contact ...

1 Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC 27599, USA 2 Department of Psychiatry, Washington University School of Medicine, St ...

This applet allows users to specify a hypothesized population proportion, sample proportion and sample size as well as an alternative hypothesis and significance level. After changing the values, the ...