Transcription of 14.1 Introduction
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14.1 Introduction
238 MATHEMATICSFile Name : C:\Computer Station\Maths-IX\Chapter\Chap-14\Chap-14 (02-01-2006). IntroductionEveryday we come across a lot of information in the form of facts, numerical figures,tables, graphs, etc. These are provided by newspapers, televisions, magazines andother means of communication. These may relate to cricket batting or bowling averages,profits of a company, temperatures of cities, expenditures in various sectors of a fiveyear plan, polling results, and so on. These facts or figures, which are numerical orotherwise, collected with a definite purpose are called data. Data is the plural form ofthe Latin word datum. Of course, the word data is not new for you. You havestudied about data and data handling in earlier world is becoming more and more information oriented. Every part of ourlives utilises data in one form or the other.
certain important features at a glance. This is called a grouped frequency distribution table. Here we can easily observe that 50% or more plants survived in 8 + 18 + 10 + 23 + 12 = 71 schools. We observe that the classes in the table above are non-overlapping. Note that we could have made more classes of shorter size, or fewer classes of ...
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