| Term No. | Term Name/Term Description | Action |
|---|
| 1 |
| Abnormal | 1 - Not normal. The term is used without any quantitative meaning, its use depends on judgement of the past records of similar occurrences. 2 - Above or below the normal value of an element, regardless of the degree of deviation.
..... | | Similar Terms |
| 2 |
| Normal | | A mean or average value established from a series of observations for purposes of comparison of some meteorological or hydrological events...... | | Similar Terms |
| 6 |
| Accuracy of the mean | | The closeness of agreement between the true value and the mean result obtained by applying the experimental procedure to a very large number of times. The smaller the systematic part of the experimental errors which affect the results, the more accurate is the procedure...... | | Similar Terms |
| 8 |
| Anomaly | | A deviation from a norm not apparently explainable with available data. | | Similar Terms |
| 9 |
| Approximate | | Approaching, or near to exactness, but not completely accurate. | | Similar Terms |
| 14 |
| Datum | | 1 - Any graphical numerical or geometrical quantity or set of such quantities that may serve as a reference or base for other quantities. 2 - See 2071 and 3306...... | | Similar Terms |
| 16 |
| Primary sample | | A sample taken from a population during the preliminary stage of multistage sampling. | | Similar Terms |
| 17 |
| Multistage sampling | | A type of sampling when the sample is selected by stages, the sampling units at each stage being sub-sampled from the larger units chosen at the previous stage...... | | Similar Terms |
| 18 |
| Systematic deterministic | | A theory that predicts precisely how each observation will turn out, not merely what proportion of observations will in the long run turn out in each of a number of possible ways (See 19)...... | | Similar Terms |
| 19 |
| Stochastic, Probabilistic, or Random | | 1 - A contrast to the `deterministic` theory, a stochastic theory merely predicts what proportion of observations will in the long run turn out in each of a number of possible ways (See 18). 2 - The adjective `stochastic` implies presence of a random variable; Stochastic process incorporates an element of randomness unlike `deterministic` process...... | | Similar Terms |
| 22 |
| Accidental error, or Random error | | An error due to chance causes when, the sign of the error may be plus or minus. In a series of measurements accidental errors are compensating in their total effect (See 30)...... | | Similar Terms |
| 24 |
| Similar Terms |
| 25 |
| Experimental error | | In general, any error in an experiment whether due to stochastic variation or bias. More specifically, the expression is used to denote the essential probabilistic variation to be expected under repetition of the experiment and not actual mistakes in the design or avoidable imperfections in technique or computations...... | | Similar Terms |
| 26 |
| Instrumental error | | A systematic error arising from the imperfect condition of the instrument used. | | Similar Terms |
| 30 |
| Systematic error | | 1 - An error which, for known changes in field conditions, undergoes proportional changes in magnitude and which, for unchanging conditions, remains unchanged, both in sign and magnitude. Because in given conditions, the sign of a systematic error remains the same, the separate errors in a series of measurements will be cumulative in their total ef..... | | Similar Terms |
| 33 |
| Sample size | | The expanse of sampling units which are to be included in the sample. | | Similar Terms |
| 34 |
| Sampling distribution | | The distribution of a statistic (or set of statistics) in all possible samples chosen according to a specified sampling scheme...... | | Similar Terms |
| 35 |
| Sampling error | | That part of the difference between a population value and an estimate thereof, derived from a random sample, due to fact that only a sample of value is observed; as distinct from errors due to imperfect selection, bias in response or estimation, errors of observation and recording, etc. The totality of sampling errors in all possible samples of th..... | | Similar Terms |
| 36 |
| Law of large numbers | | The larger the samples, the less will be the variability in the sample averages and probability of occurrences. The law of large numbers works by its swamping effect rather than by compensation. By the law of large numbers, the average of a large number of independent measurements will be more precise and, therefore, have more reliability than a si..... | | Similar Terms |
| 38 |
| Index number | | A statistical indicator for reflecting the changes in magnitude of items in a series or groups of data, in terms of the value of a part of the respective data selected as a base...... | | Similar Terms |
| 41 |
| Paired comparison | | The comparison of two samples of equal size where the members of one can be paired off against the members of the other. | | Similar Terms |
| 42 |
| Parameter | | 1 - An unknown factor that may vary over a certain set of values. This word occurs in defining frequency distributions (e.g. `population parameter`) or in models describing stochastic situations (e.g. `regression parameters`). The statistics that we determine from the samples of a population are estimates of the unknown parameters. 2 - A summary me..... | | Similar Terms |
| 43 |
| Parametric test, or Test parametric | | A test when the distribution function of the test statistic depends on the form of the distribution function of the observations. Example Student test of the null hypothesis that the mean of a population with unknown variance is equal to a given value, where the distribution of the population must be supposed normal...... | | Similar Terms |
| 44 |
| Sample | | 1 - A part of a population, or a subset from a set of units, that is provided by some process, usually a deliberate selection with the object of investigating the properties of the parent population or set. 2 - The data or the observations numbers that have been observed...... | | Similar Terms |
| 53 |
| Time series | | A time series is a set of ordered observations on a quantitative characteristic of an individual or collective phenomena taken at different points of time. The essential quality of the series is the order of observations according to the time variable...... | | Similar Terms |
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