# confidence level

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Related to confidence level: significance level

## level

[lev´el]
relative position, rank, or concentration.
l's of care the six divisions of the health care system: preventive care, primary care, secondary or acute care, tertiary care, restorative care, and continuing care.
background level the usual intensity of a chemical or other stimulus in the environment.
confidence level the probability that a confidence interval does not contain the population parameter.
l's of consciousness see levels of consciousness.
lowest observed adverse effect level (LOAEL) (lowest observed effect level (LOEL)) in studies of the toxicity of chemicals, the lowest dosage level at which chronic exposure to the substance shows adverse effects; usually calculated for laboratory animals.
no observed adverse effect level (NOAEL) (no observed effect level (NOEL)) in studies of the toxicity of chemicals, the highest dosage level at which chronic exposure to the substance shows no adverse effects; usually calculated for laboratory animals.
level of significance a statistical measure that serves as the cutoff point used to determine whether a null hypothesis is retained or rejected; the probability of incorrectly rejecting the null hypothesis (see Type I error).
sterility assurance level (SAL) the probability that a process makes something sterile (see sterilization). An SAL of 10−6 is the recommended probability of survival for organisms on a sterilized device. This level means that there is less than or equal to one chance in a million that an item remains contaminated or nonsterile.

## confidence level

The probability associated with a confidence interval, and stated as a part of that interval.

## confidence

degree of assurance.

confidence interval
a range of values about a sample statistic that has a specified probability of including the true value of the statistic.
confidence level
1 minus the type 1 error; the probability that the trial under consideration will show no significant difference when there is in fact no significant difference between the treatments.
confidence limits
the highest and lowest values in a confidence interval.
References in periodicals archive ?
Hence, the user will see that the confidence level is, indeed, the approximate percentage of confidence intervals which contain the population mean as presented in Figure 6.
1692 which falls in the acceptance region at 99%, 95%, 90% and even at 80% confidence level and conclude that the satisfaction with work environment of Islamic bank and conventional bank don't differ significantly.
A covered opinion that fails to conclude at a confidence level of at least more likely than not with respect to a significant federal tax issue must prominently disclose that the opinion does not reach this confidence level and the taxpayer may not use the opinion to avoid penalties.
As the time measurement accuracy is [+ or -] 1% without mentioning the confidence level, the relative uncertainty Uv = 0.
In the most basic iteration of the hierarchy, the meaningful confidence levels range upward from:
Aroon Purie, editor- in- chief, India Today Group, said that low confidence level over a long period of time creates a vicious cycle that is difficult to break.
Consumer confidence levels in the UAE have been steadily increasing in our most recent indices, reflecting a positive outlook for key sectors and confidence in the UAE's plans and vision for the coming years," said Eyad Al Kourdi, UAE country manager for MasterCard.
Respondents indicated an increase in confidence levels for four of the five indicators as compared to six months ago, and were most optimistic about Regular Income (91.
Mr Cook said the confidence level was a "huge tribute" to the Chief Constable Sean Price, every officer and member of staff, and to Cleveland Police Authority.
Surgical unit students rated their confidence level in making clinical decisions using a textbook as 2.
The appraiser can invoke USPAP's Departure Rule, which allows him, with client consent, to produce a report with a lower confidence level (statistically speaking) than a complete appraisal.

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