[STA 1063C] - Midterm Exam Guide - Everything you need to know! (10 pages long)
Document Summary
What is statistics: the science of collecting, organizing, and interpreting data to make decisions. Data consist of information coming from observations, counts, measurements, or responses. Types of data sets: population: the collection of all responses that are of interest, sample: a subset of the population. Parameter: a number that describes a population characteristic, generally greek letters. Statistic: a number that describes a sample characteristic, usually letters with a bar/hat over it. Branches of statistics: descriptive statistics: organizing, summarizing, and displaying data, inferential statistics: involves using sample data to draw conclusions about a population. A gallup poll is interested in the percent of american adult males that use the internet at least once aa day. Quantitative: values of x are numerical measurements. Levels of measurement: nominal name only - qualitative only, categorized using names, labels, or qualities. Zero represents a position on a scale, not an inherent zero.
