An Alternative Definition for IQR. In some texts, the interquartile range is defined differently. It is defined as the difference between the largest and smallest values in the middle 50% of a set of data. To compute an interquartile range using this definition, first remove observations from the lower quartile.
A hard drive is a device used to store data in a semipermanent state on your computer. Computer memory is a series of small packets of data called bits. Each bit is a 1 or a 0, and each bit is stored as a small magnetic charge on the hard drive. A read/write head moves over the hard drive to retrieve or rewrite the bits as needed.
(dÉªsk) n. 1. a variant spelling (esp US and Canadian) of disc. 2. (Computer Science) computing Also called: magnetic disk or hard disk a direct-access storage device consisting of a stack of plates coated with a magnetic layer, the whole assembly rotating rapidly as a single unit.