What is the difference between measurement validity and interview validation? Validity is a general term which is strongly associated with research. It is actually an indication of how sound a research study is and it specifically applies to the design …

Chapter 13: Data Processing, Data Analysis, and Statistical Testing Read more »

A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the past 30 days, with a tolerable sampling error (E) of 0.03 and a confidence level of 97.5%.  If secondary …

A researcher wants to estimate the percentage of all adults that have used Read more »