What's the difference between bias and estimator?

Bias


Definition:

  • (n.) A weight on the side of the ball used in the game of bowls, or a tendency imparted to the ball, which turns it from a straight line.
  • (n.) A leaning of the mind; propensity or prepossession toward an object or view, not leaving the mind indifferent; bent; inclination.
  • (n.) A wedge-shaped piece of cloth taken out of a garment (as the waist of a dress) to diminish its circumference.
  • (n.) A slant; a diagonal; as, to cut cloth on the bias.
  • (a.) Inclined to one side; swelled on one side.
  • (a.) Cut slanting or diagonally, as cloth.
  • (adv.) In a slanting manner; crosswise; obliquely; diagonally; as, to cut cloth bias.
  • (v. t.) To incline to one side; to give a particular direction to; to influence; to prejudice; to prepossess.

Example Sentences:

  • (1) Such a decrease significantly biased survival (p = 0.001).
  • (2) Even though attempts to generalize the data from childbearing women to women of childbearing age have an inherent conservative bias, the results of our study suggest that 988 women (95% CI 713 to 1336) aged 15 to 44 years in Quebec had HIV infection in 1989.
  • (3) These deficiencies in the data compromise HIV surveillance based on diagnostic testing, and supplementary bias-free data are needed.
  • (4) In addition, despite the fact that the differences constitutes an information bias, the bias occurs in the same direction and magnitude in all the various subgroups and thus is nondifferential.
  • (5) However, each of the studies had numerous methodological flaws which biased their results against finding a relationship: either their outcome measures had questionable validity, their research designs were inappropriate, or the statistical analyses were poorly conceived.
  • (6) Methods to minimize bias in the design and implementation of consultation-liaison research are suggested.
  • (7) Results were inconsistent with both the feature detector fatigue and response bias hypothesis.
  • (8) Special conditions apply for the scoring of a first and a last bone stage in a sequence, which will introduce less bias in the estimation of individual skeletal maturity with the MAT-method than with the TW-method.
  • (9) The greater use of health services for female children probably accounts for the female-biased sex ratio among the Mukogodo.
  • (10) The possibility that selective bias or unmeasured environmental differences might explain the difference in BP between the two groups is discussed.
  • (11) In Study 4, attributional biases and deficits were found to be positively correlated with the rate of reactive aggression (but not proactive aggression) displayed in free play with peers (N = 127).
  • (12) Significant biases in the distribution of cases of babesiosis were found with regard to season (P < 0,05), sex (P < 0,001) and coat colour (P < 0.01).
  • (13) This suggests that monitoring heart rate during limited portions of the day will provide a biased estimate of overall heart rate.
  • (14) Analogous biases and solutions apply to other sampling problems in health services research.
  • (15) Only eye position proved statistically significant; straight-ahead eye position induced more bias than did fixation of the visual stimulus.
  • (16) A model was investigated which simulated choices one may have between disease classification tests, to determine how the required sample size and bias in the estimates of the risk ratio and risk difference varied between tests.
  • (17) Paradigm relies heavily on social science research and analysis to help companies identify and address the specific barriers and unconscious biases that might be affecting their diversity efforts: things like anonymizing resumes so that employers can’t tell a candidate’s gender or ethnicity, or modifying a salary negotiation process that places women and minorities at a disadvantage.
  • (18) We confirm that sera from patients on intravenous therapy with lidocaine exhibit a positive bias in results for creatinine but that lidocaine itself does not interfere.
  • (19) We discuss advantages and disadvantages of total randomization, of Zelen-type randomization procedures, of Efron-type procedures vs more classical blocking procedures to control the balance between groups, and of Simon-Pocock-type procedures vs more classical stratification for controlling possible biases in prognostic factors.
  • (20) (4) R(XY)(t,tau) is a biased estimator of the shape of h(t), generally over-estimating both its time to peak and its rise time.

Estimator


Definition:

  • (n.) One who estimates or values; a valuer.

Example Sentences:

  • (1) Changes in cardiac adenosine triphosphate (ATP), phosphocreatine (PCr) and inorganic phosphate (Pi) were followed and intracellular pH (pHi) was estimated from the chemical shift of Pi.
  • (2) Estimations of the degree of incorporation of 14C from the radioactive labeled carbohydrate into the glycerol and fatty acid moieties were carried out.
  • (3) We conclude that the SHBG concentration strongly affects this estimation.
  • (4) In this review, we demonstrate that serum creatinine does not provide an adequate estimate of glomerular filtration rate (GFR), and contrary to recent teachings, that the slope of the reciprocal of serum creatinine vs time does not permit an accurate assessment of the rate of progression of renal disease.
  • (5) The models are applied to estimate the demand for tobacco products in Finland.
  • (6) Estimates of the risk probability for each dose level and sacrifice time are found utilizing the sample likelihood as the posterior density.
  • (7) Estimates of potential for gastrointestinal side effects using the rat enteropooling assay and in vivo monkey effects indicate that diarrhea will be substantially reduced with retention of uterine stimulating potency.
  • (8) The ED50 and ED95 of mivacurium in each group were estimated from linear regression plots of log dose vs probit of maximum percentage depression of neuromuscular function.
  • (9) We are pursuing legal action because there are still so many unanswered questions about the viability of Shenhua’s proposed koala plan and it seems at this point the plan does not guarantee the survival of the estimated 262 koalas currently living where Shenhua wants to put its mine,” said Ranclaud.
  • (10) To estimate the age of onset of these differences, and to assess their relationship to abdominal and gluteal adipocyte size, we measured adiposity, adipocyte size, and glucose and insulin concentrations during a glucose tolerance test in lean (less than 20% body fat), prepubertal children from each race.
  • (11) The level of significance of the statistical estimate of the change in the number of phonoreactive units (its increase due to deprivation) amounts to 92%.
  • (12) Variables included an ego-delay measure obtained from temporal estimations, perceptions of temporal dominance and relatedness obtained from Cottle's Circles Test, Ss' ages, and a measure of long-term posthospital adjustment.
  • (13) The molecular weight of antigen RFB2 was estimated to be approximately 85,000 daltons based on the results of gel filtration on Sepharose CL-6B.
  • (14) The radius is estimated to be around 1.7 nm, which shows a moderate degree of hydration.
  • (15) Another important factor, however, seems to be that patients, their families, doctors and employers estimate capacity of performance on account of the specific illness, thus calling for intensified efforts toward rehabilitation.
  • (16) The estimated DNA compaction ratio (approximately 3-fold) is consistent with a significant degree of nucleosome unfolding in the hyperstimulated BR genes.
  • (17) The Pan American Health Organization, the Americas arm of the World Health Organization, estimated the deaths from Tuesday's magnitude 7 quake at between 50,000 and 100,000, but said that was a "huge guess".
  • (18) The risk of recurrence and progression in 170 patients presenting with pTa urothelial tumours of the bladder has been estimated so that follow-up can be rationalised.
  • (19) Serum gamma glutamyl transferase (gammaGT) and alkaline phosphatase (ALP) activities have been estimated in 49 epileptic patients taking anticonvulsant drugs.
  • (20) The effect of these drugs was estimated from the cell growth curve and DNA histogram determined by flow cytometry.

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