Reading Frequency Tables and Histograms

Frequency distributions organize quantitative data by showing how often each value appears. A frequency is the number of times a data value occurs. When the frequency values are added together, the total equals the number of students in the sample.

These distributions are useful for grouping nume...

Consider a group of 50 individuals participating in a marathon. Suppose the organizers of the marathon want to know how the number of participants varies with age.

To find out, the data are summarized using a frequency distribution table. It is a statistical tool that represents data divided among several categories or classes against the...