SPSS stands for Statistical Package for the Social Sciences, a software which is widely used as an Statistical Analytic Tool in the Field of Social Science, Such as Market research, Surveys, Competitor Analysis, Healthcare, Government, Education, and others. This tool first launched in 1968, in the dark ages of computing, before we had discovered the … Continue reading What is SPSS?
Major Types of Data Observations about qualitative variables are typically made in words but are possibly coded into numbers later on for purposes of data processing. Observations about quantitative variables, in contrast, are numerical at the outset. Anyone who works with numbers, therefore, must be very clear about what, if anything, is measured by them.
Errors in Survey Data All survey data are subject to error; errors can arise from innumerable, often unexpected, sources. Errors can be generated during the planning stage of a survey, more errors can be created during the later stages of data recording and processing. Indeed, we cannot list all the ways in which surveys can go wrong. It is possible, however, to raise our awareness of the problem by focusing on two broad categories of error, random error and systematic error (or bias).
Types of Samples
Reasons for sampling