the ratio of the number of observations in a statistical category to the total number of observations

the number of occurrences within a given time period

(statistics) the selection of a suitable sample for study

the number of observations in a given statistical category

measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form)

items selected at random from a population and used to test hypotheses about the population

(electronics) a graph of frequency response with signal amplitude or gain plotted against frequency

(electronics) a graph of frequency response with signal amplitude or gain plotted against frequency