bias

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Related to Bias voltage: bias current, Quiescent point, operating point

bias

 [bi´as]
1. (in a measurement process) systematic error.
2. any influence or action at any stage of a study that systematically distorts the findings.
3. (of a statistical estimator) the difference between the expected value of the estimator and the true parameter value.

bi·as

(bī'-as),
1. Systematic discrepancy between a measurement and the true value; may be constant or proportionate and may adversely affect test results.
2. Any trend in the collection, analysis, interpretation, publication, or review of data that can lead to conclusions that differ systematically from the truth; deviation of results or inferences from the truth, or processes leading to deviation.
[Fr. biais, obliquity, perh. fr. L. bifax, two-faced]

There is no imputation of prejudice, partisanship, or other subjective or emotional factor such as an investigator's desire to achieve a particular outcome. More than 100 varieties of bias have been described, but all fall into a small number of classes: 1. Systematic one-sided variation of measurements from the true value. SYN systematic error, instrumental error 2. Variation of statistical summary measures (means, rates, measures of association) from their true values as a result of systematic variation of measurements, other flaws in data collection, or flaws in study design or analysis. 3. Deviation of inferences from the truth as a result of flaws in study design, data collection, or the analysis or interpretation of results. 4. A tendency of procedures in study design, data collection, analysis, interpretation, review or publication, to yield results or conclusions that depart from the truth. 5. Prejudice leading to the conscious or subconscious selection of study procedures that depart from the truth in a particular direction, or to one-sidedness in interpretation of results. This last form of bias can arise as a result of shoddy scientific methods or deliberate misrepresentation of the truth by investigators.

bias

[bī′əs]
Etymology: MFr, biais
1 an oblique or a diagonal line.
2 a prejudiced or subjective attitude.
3 (in statistics) the distortion of statistical findings from the true value. There can be many kinds of bias; some may be caused by the sampling process, but bias can be caused by other factors.
4 (in electronics) a voltage applied to an electronic device, such as a vacuum tube or a transistor, to control operating limits. See also detection bias.

bias

Epidemiology Deviation of results or inferences from the truth, or processes leading to such systematic deviation; any trend in the collection, analysis, interpretation, publication, or review of data that can lead to conclusions that are systematically incorrect

bi·as

(bī'ăs)
1. Systematic discrepancy between a measurement and the true value; may be constant or proportionate and may adversely affect test results.
2. Any trend in the collection, analysis, interpretation, publication, or review of data that can lead to conclusions that differ systematically from the truth; deviation of results or inferences from the truth, or processes leading to deviation.
[Fr. biais, obliquity, perh. fr. L. bifax, two-faced]

bi·as

(bī'ăs)
1. Systematic discrepancy between a measurement and the true value; may be constant or proportionate and may adversely affect test results.
2. Any trend in the collection, analysis, interpretation, publication, or review, which can lead to conclusions that differ systematically from the truth; deviation of results or inferences from the truth, or processes leading to deviation.
[Fr. biais, obliquity, perh. fr. L. bifax, two-faced]

bias,

n in statistics, the systematic distortion of a statistic caused by a particular sampling process.

bias

any systematic error in the design, conduct or analysis of a study which results in estimates which depart from true values. An unbiased study is free from systematic error. Many types of bias have been named, but three general types can be identified, selection bias, information bias and confounding. Selection bias is a systematic error in a study caused by the individuals selected into the study being different from the entire target population in an important way. See also berkson's bias. Information bias is a systematic error in a study caused by errors in the data which are collected in the study, or in the analysis of the data.
References in periodicals archive ?
As the bias voltage is increased, the dominant current conduction mechanism follows the order; Ohmic conduction, trap-filled space charge-limited current and space charge-limited current.
As the bias voltage of the n-doped layer is decreased, electrons tunnel from the n-doped layer into the neighboring quantum dots and are detected by the SET.
3V singularity voltage source of PD bias voltage (Vpd) and supply voltage for trans-impedance amplifiers (Vcc)
Exar achieves the low dropout performance of the XR71211 regulator without requiring either an external bias voltage or an internal charge pump, which can often generate unwanted noise and affect system operation.
A high tunneling bias voltage of up to 10 V was used for writing.
In addition, designers can take advantage of the intrinsic benefits of ceramics, such as better DC bias voltage characteristics," said Kazushige Takamori, product manager at AVX.
Exar achieves the ultra low dropout performance of its XRP6274 and XRP6275 regulators without requiring either an external bias voltage or an internal charge pump, which can often generate unwanted noise and affect system operation.
The tests are divided into three parts: a test of moderate bias voltage, high voltage test continuously applied stepwise and partial discharge test.
The calculations indicated that the application of the bias voltage caused a substantial charge density rearrangement.
This allows extending the gate scaling beyond the planar transistor limits, maintaining a steep sub- threshold slope, better performance with bias voltage scaling and good matching due to low doping concentration in the channel.