Analysing Frequency Tables

Analysing Frequency Tables in NSW Year 8 maths (NESA outcome MA4‑DAT‑C‑02) adds two working columns to a frequency table: \(fx\), which gives the total of the data, and the cumulative frequency, a running total that locates the median.

You will find the mean as \(\frac{\sum fx}{\sum f}\), the mode, median and range from a table, and the relative frequency of each row as a decimal or a percentage. With grouped data you will use class centres to estimate a mean and name the modal class. You will also find a missing frequency and fix common mistakes, such as averaging the values column and ignoring the frequencies. It is part of Year 8 Investigating Data.