Power analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required sample size for ...

Quantitative research relies on analyzing statistical data, while qualitative research focuses on answering important business questions, including discovering why customers select products or ...

Statistics is difficult, and choosing the proper tools becomes more challenging as experiments become more complex. That's why it's not uncommon for large genetics or epidemiological studies to have a ...

Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...

Transactions of the Kansas Academy of Science (1903-), Vol. 86, No. 2/3 (1983), pp. 76-80 (5 pages) Previous research reported descriptive statistics on the typical sample size in psychological ...

Endotoxin testing is a vital component of pharmaceutical, biologic, and medical device quality control, with a direct impact on medication safety. As detection technologies have advanced, the ...

Greg DePersio has 13+ years of professional experience in sales and SEO and 3+ years as a writer and editor. Simple random sampling is a method used to cull a smaller sample size from a larger ...