Item response theory (TRI), also known as latent response theory, refers to a family of mathematical models that attempt to explain the relationship between latent traits (unobservable characteristic or attribute) and their manifestations (i.e., observed results,...
With inferential statistics, we try to reach conclusions that go beyond the immediate data. For example, we used inferential statistics to try to infer from the sample data what the population might think. Or, we use inferential statistics to make judgments about the...
A tabulation plan is a set of tabulation specifications, in which a research analyst outlines all the tables, statistics, and other special requests needed for analysis. The tabulation plan will serve as a guide for converting data into meaningful results. What is the...
Be a good observer in a fundamental aspect when conducting research. Observation is the process of observing someone or something. It is often an informal action, but it can also be formal and involve data collection. It can also be the information collected itself....
When conducting research on a group of people, it is rarely possible to collect data from all the people in that group. Instead, sampling is done. The sample is the group of individuals who will actually participate in the research. To draw valid conclusions from your...
Since the invention of computers, people have used the term data to refer to computer information. This information was transmitted or stored. But that’s not the only definition of data; there are other types of data as well. So how can you verify the quality of...
