usaldusnivoo, usaldustegur
tõenäosuse väärtus (1 - α), mis on seotud usaldusvahemiku või statistilise kattevahemikuga, value (1 - α) of the probability associated with a confidence interval or a statistical coverage interval, probability that the value will lie between the specified confidence limits, assuming negligible systematic error, probability that the true value will lie the specified confidence limits, assuming negligible systematic error