Understanding Data

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Data is a collection of characters, numbers, and other symbols that represents values of some situations or variables. Data is plural and its singular form is 'datum'. Data needs to be gathered, proce

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Structured data is organized data that can be recorded in a well-defined format, usually in a tabular format with rows and columns. Each column represents different attributes/characteristics, and eac

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Unstructured data is data that does not follow a traditional row and column structure or has no fixed pattern. Examples: 1) Web pages with text and multimedia content, 2) Email content with varying le

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Metadata is data about data. It describes different parts or characteristics of the main data. Example: For an email, metadata includes subject, recipient, sender, timestamp, attachment details. For a

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Data helps identify patterns, trends, and hidden traits that are not visible to humans. Business examples: 1) Airlines use dynamic pricing based on demand-supply data, 2) Shopping malls analyze purcha

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The basic steps in data processing are: 1) Data Collection - gathering data from appropriate sources, 2) Data Preparation - organizing and cleaning the data, 3) Data Entry - inputting data into digita

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Mean is the average of numeric values of an attribute. It is calculated as: Mean (x̄) = Σxi/n, where xi are individual values and n is the total number of values. Example: Heights [90,102,110,115,85]

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Median is the middle value when data is arranged in ascending/descending order. For odd number of values: median is the middle value. For even number of values: median is the average of two middle val