Browse Definitions :
Definition

statistical noise

Statistical noise is unexplained variability within a data sample. The term noise, in this context, came from signal processing where it was used to refer to unwanted electrical or electromagnetic energy that degrades the quality of signals and data. The presence of noise means that the results of sampling might not be duplicated if the process were repeated.

Noisy data is data that’s rendered meaningless by the existence of too much variation. It’s assumed that the signal (deterministic or meaningful data) is present but obscured by the noise (random data). Originally considered to refer to corrupt data, noisy data now refers to any data that is not machine readable. As such, it includes unstructured text as well as any data that has been altered in some way that it is no longer compatible with the program used to create it.  

The problem of separating out the noise from the signal has long been a focus in statistics, so that the meaningful data could inform the researchers. Often, however, the portion of noisy data that is meaningful is too small to be useful.

In a non-scientific context, people often use the term statistical noise to dismiss data that doesn’t please them or conform to their expectations.

This was last updated in August 2017

Continue Reading About statistical noise

SearchCompliance
  • pure risk

    Pure risk refers to risks that are beyond human control and result in a loss or no loss with no possibility of financial gain.

  • risk reporting

    Risk reporting is a method of identifying risks tied to or potentially impacting an organization's business processes.

  • risk avoidance

    Risk avoidance is the elimination of hazards, activities and exposures that can negatively affect an organization and its assets.

SearchSecurity
  • script kiddie

    Script kiddie is a derogative term that computer hackers coined to refer to immature, but often just as dangerous, exploiters of ...

  • cipher

    In cryptography, a cipher is an algorithm for encrypting and decrypting data.

  • What is risk analysis?

    Risk analysis is the process of identifying and analyzing potential issues that could negatively impact key business initiatives ...

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • fault-tolerant

    Fault-tolerant technology is a capability of a computer system, electronic system or network to deliver uninterrupted service, ...

  • synchronous replication

    Synchronous replication is the process of copying data over a storage area network, local area network or wide area network so ...

SearchStorage
  • gigabyte (GB)

    A gigabyte (GB) -- pronounced with two hard Gs -- is a unit of data storage capacity that is roughly equivalent to 1 billion ...

  • MRAM (magnetoresistive random access memory)

    MRAM (magnetoresistive random access memory) is a method of storing data bits using magnetic states instead of the electrical ...

  • storage volume

    A storage volume is an identifiable unit of data storage. It can be a removable hard disk, but it does not have to be a unit that...

Close