单选题 Which of the following best describes a frequency distribution? A frequency distribution is a grouping of: A. data into intervals (classes) so that the number of observations in each of the non - overlapping intervals (classes) can be seen and tallied. B. selected data into intervals (classes) so that the number of observations in each of the non - overlapping intervals (classes) can be seen and tallied. C. dependent intervals (classes) so that they can be seen and tallied.