**D.1** Terminology
**D.2** Identification of uncertainty components
**D.3** Equation (A-2)
**D.4** Measurand defined by the measurement method; characterization of test methods; simple calibration
**D.5 ***t*_{p} and the quantile *t*_{1-α}
**D.6** Uncertainty and units of the SI; proper use of the SI and quantity and unit symbols
**D.7** References

**D.5.1** As pointed out in the *Guide*, the *t*-distribution is often tabulated in quantiles. That is, values of the quantile *t*_{1-α} are given, where 1 - α denotes the cumulative probability and the relation $$1 - \alpha = \int_{-\infty}^{t_{1-\alpha}} f(t,\nu) {\rm d}t $$ defines the quantile, where *f* is the probability density function of *t*. Thus *t*_{p} of this Technical Note and of the *Guide* and *t*_{1-α} are related by *p* = 1 - 2α. For example, the value of the quantile *t*_{0.975}, for which 1 - α = 0.975 and α = 0.025, is the same as *t*_{p}(ν) for *p* = 0.95, It should be noted, however, that in reference [D.2] the symbol *p* is used for the cumulative probability 1 - α, and the resulting *t*_{p}(ν) is called the "quantile of order *p* of the *t* variable with ν degrees of freedom." Clearly, the values of *t*_{p}(ν) defined in this way differ from the values of *t*_{p}(ν) defined as in this Technical Note and in the *Guide*, and given in Table B.1 (which is of the same form as that given in reference [10]). Thus, one must use tables of tabulated values of *t*_{p}(ν) with some care.