[COMMERCE 2QA3] - Final Exam Guide - Everything you need to know! (80 pages long)

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Document Summary

A way of reasoning: designed to help us understand the world. 20th and 21st century statistics: analysing large amounts of data, generalizing results from small samples. 21st century statistics: real time analysis of data, analysing vast amounts of data. The cutting edge: answering open ended questions. Who we record characteristics about: the rows of a data table. The characteristics recorded about each case: the columns of a data table. Experimental units: animals, websites and intimate subjects. Linking together two or more data tables: each data table is called a relation. Includes information about all variables for each case. Relational database with 3 relations: customer, item and transaction data. Looking up a customer: shows what items they purchased. Looking up an item: shows who purchased it. Names categories and identifies a category for each case: does(cid:374)"t tell us the (cid:395)ua(cid:374)tity of so(cid:373)ethi(cid:374)g (cid:373)easu(cid:396)ed. Measured numerical values with units: does tells us the quantity of something measured.