In this lesson we are going to learn about the types of statistical data and the nature of statistical data
Types of Statistical Data Primary Data - First hand or original information from the field e.g. Mean daily temperature from a weather station Enumeration/census Secondary/Derived Data - 2nd hand information available in stored sources compiled by other researchers e.g. • Textbooks• Reference books • Maps • Video/audio tapes • Newspapers • Magazines • Census reports • Slides • Census reports Nature of Statistical Data 1. Discrete Data -Which is given in whole numbers e.g.16 elephants 1093 tonnes of wheat 2. Continuous Data - Facts and figures which can take any value e.g. • Fractions e.g.23 ¼ • Decimals e.g. 6.20 mm • Values within range e.g. 0-30◦c 3. Grouped Data - Which is non precise/exact but values range in groups e.g.Sources of Statistical Data 1. Primary Sources -People or places which have 1st hand or original information. The information can be collected by observation, measuring, counting, photographing etc. Advantages • Gives firsthand information• The information can’t be got from other sources 2. Secondary sources -Materials in which information collected by others was stored e.g. text books, reference books, etc.