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Elaboration ACTDIK035

explaining how simple compression schemes reduce the size of repetitive data, for example how run length encoding reduces the size of images

Elaboration (1) ACTDIK035

explaining the difference between lossy and lossless compression, for example the difference between JPEG and PNG images

Elaboration (2) ACTDIK035

explaining codecs for audio-visual compression, for example common codecs for video formats

Elaboration (3) ACTDIK035

generating a layout or report in a database or applying a style sheet to a web page

developing strategies and techniques for capturing accurate and usable qualitative and quantitative data of different formats, for example using text entry for open-ended questions to acquire qualitative data; using radio buttons or checkboxes for closed …

Elaboration (1) ACTDIP036

identifying strengths and weaknesses of collecting data using different methods, for example online surveys, face-to-face interviews, phone interviews, observation, blog entries in response to a posting, phone logs, browser history and online webcam …

Elaboration (2) ACTDIP036

developing strategies to ensure the privacy and security of survey data, for example using numbers rather than names as identifiers; password protecting files to reduce risks of modifying data and using CAPTCHA™ to confirm human responses

Elaboration (3) ACTDIP036

extracting specific data from an external source and storing it in a format that is more useful for analysis, for example combining mapping data from multiple electronic data sets to build a composite representation

Elaboration ACTDIP037

using visualisation software tools to identify patterns and relationships between sets of data and information, and support abstract reasoning, for example representing data using histograms, network diagrams and maps

Elaboration (1) ACTDIP037

summarising data using advanced filtering and grouping techniques, for example pivot tables in spreadsheets and aggregation functions in databases

Elaboration (2) ACTDIP037

automating calculations, for example using absolute cell referencing to automatically extend formulas, and automating arithmetic calculations using built-in functions such as trigonometry, compound interest

Elaboration (3) ACTDIP037

simulating simple, iterative processes, for example modelling compound interest or ecological models using a spreadsheet

Elaboration (4) ACTDIP037

documenting the attributes of complex objects and processes using a data dictionary

Elaboration (5) ACTDIP037

interpreting schemas that represent relationships between entities and querying data across tables, for example using foreign keys to represent relationships and joining tables in structured query language (SQL) SELECT statements

Elaboration ACTDIP038

developing a preliminary specification for an opportunity or a need that typically contains a problem statement, a set of solution needs expressed as functional and non-functional requirements, any assumptions or constraints to be considered and the scope …

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