Inferential Statistics Basics

613 WordsFeb 1, 20182 Pages
1) Define the following terms: i) Inferential statistics is reasonable conclusions based on assumption of what one will have observed. (Tucker 1988) It is restricted to one’s environment for example one might say tall people are fast runners or big women are associated with high blood pressure. (Chimedza, Muchengetwa, Chinyemba 2010) ii) According to (Chimedza, Muchengetwa & Chinyemba 2010) data is a collection of numbers or observations of things that are happening brought together for reference or analysis for example hourly movement of a cyclone.(Tucker 1988) iii) Representative sample refers to a particular group that will have been chosen to represent others that is a subset of a statistical population that accurately reflects the members of the entire population (Tucker 1988) For example in a class of six students three male and three female this is unbiased but well represented. iv) Qualitative data is data that cannot be measured numerically and but describes (Tucker 1988) for example sex or marital status. v) Discrete data refers to specific separate and distinct variables. (Moore 1995, 2000) For example colour of hair or eyes even number of books in a library. b) Differentiate the following terms i) Systematic sampling elements are chosen following a systematic procedure at evenly spaced intervals after the first has been randomly selected for example a researcher can get opinions of residents of a particular suburb by interviewing one house in each street