Definition of class interval in US English:

class interval


  • The size of each class into which a range of a variable is divided, as represented by the divisions of a histogram or bar chart.

    • ‘However, no matter what headway distributions are used, or how accurately they are modelled, the probability density functions themselves describe the distribution of headways by sorting headways into different class intervals.’
    • ‘The width of each bar along the abscissa represents a class interval of 0.1, except for the first bar.’
    • ‘The class interval was chosen to be equal to or greater than the maximum standard deviation.’
    • ‘It allowed analysis according to the different grain size class intervals for a single rock specimen.’