Summary

Data refer to unorganised facts that can be processed to generate meaningful result or information.

Data can be structured or unstructured.

Hard Disk, SSD, CD/DVD, Pen Drive, Memory Card, etc. are some of the commonly used storage devices.

Data Processing cycle involves input and storage of data, its processing and generating output.

Summarising data using statistical techniques aids in revealing data characteristics.

Mean, Median, Mode, Range, and Standard Deviation are some of the statistical techniques used for data summarisation.

Mean is the average of given values.

Median is the mid value when data are sorted in ascending/descending order.

Mode is the data value that appears most number of times. …