INTRODUCTION TO STATISTICS An Overview of Statistics VOCABULARY Data: consists of information coming from observations, counts, measurements, or responses. Statistics: the science of collecting, organizing, analyzing, and interpreting data in order to make decisions. Population: The collection of ALL outcomes, measurements, or counts that are of interest. Sample: a subset (or part) of the population EX: Classifying Data Sets Determine if the set is a population or a sample. Explain your reasoning. The annual salary of each pharmacist at a pharmacy. The cholesterol levels of 20 patients in a hospital with 100 patients. EX: Identifying Populations & Samples A study of 33, 043 infants in Italy was conducted to find a link between a heart rhythm abnormality and sudden infant death syndrome. (source: New England Journal of Medicine) A survey of 1442 US adults found that 36% received an influenza vaccine for the current flu season. (source: Zogby International) More Vocab! Parameter: a numerical description of a POPULATION characteristic. Statistic: a numerical description of a SAMPLE characteristic. There are 2 branches of Statistics… 1. Descriptive Statistics: involves organization, summarization, and display of data. 2. Inferential Statistics: involves using a sample to draw conclusions about a population.