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.
Drive. A drive is a medium that is capable of storing and reading information that is not easily removed like a disk. The picture is an example of different drives listed in Microsoft Windows My Computer.In the example shown on this page, drive A: is the floppy drive, C: is the hard disk drive, D: and E: partitions of the hard drive, and F: is the CD-ROM drive.Typically the CD-ROM drive is the last drive so in most situations the hard drive is the C: drive and a CD-ROM or other disc drive is the D: drive.Below are some examples of different drives you could have in a computer or that may be accessible by the computer.he picture is an example of different drives listed in Microsoft Windows My Computer. In the example shown on this page, drive A: is the floppy drive, C: is the hard disk drive, D: and E: partitions of the hard drive, and F: is the CD-ROM drive.