Statistics for Data Science
Definition of Statistics : The science of collecting, organizing, presenting, analyzing, and interpreting data to assist in making more effective decisions. Statistical analysis – used to manipulate summarize, and investigate data, so that useful decision making information results. TYPES OF STATISTICS: 1. Descriptive statistics – Methods of organizing, summarizing, and presenting data in an informative way. 2. Inferential statistics – The methods used to determine something about a population on the basis of a sample Population –The entire set of individuals or objects of interest or the measurements obtained from all individuals or objects of interest Sample – A portion, or part, of the population of interest 1. Descriptive statistics: Collect data e.g., Survey Present data e.g., Tables and graphs Summarize data e.g., Sample mean = ΣXi/Xn 2. Inferential statistics Estimation e.g., Estimate the population mean weight usi...