# Unordered data or replicates

Unordered or random data is defined as "unordered or randomly selected measurements from a subset of a statistical population or sample," e.g. height measurements of students in a classroom; density, porosity, permeability, or chemical composition measurements of rocks collected from a particular formation; temperature and salinity replicates at a specific ocean depth; etc. Frequency plots or histograms are often used to visualize results of such measurements.

A working knowledge of fundamental statistics (mean, variance, standard deviation) is an important aspect of working with random or univariate data. learn more here

Graphs are often used to help students visualize data. Having students make their own graphs, read data/information from graphs, and describe graphs in their own words are all important "Using Data" learning objectives. learn more here