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Yr 8

Representing & Interpreting Data

TermDefinition
Analysis To examine or interpret data
Class Intervals Uses when there is a large range of data. Too many numerical values to list individually
Column Graph Must have a title, labelled axes clearly and evenly scaled, columns have the same width even gap between each column !st column beginning half a unit in from the vertical axis
Dot Plot Like picture graphs where each piece of data is represented by a single dot.
Frequency Distribution Table Consists of three columns- Score or interval, Tally and Frequency
Legend When symbols or colours are used to show some elements of the graph
Mean Another name for average. Calculated by adding all the data values, and dividing by the number of the values in the set
Median Middle value of the data when the values are arranged in numerical order. Smallest to Largest
Mode Most frequently occurring data. The data the comes up the most
Range The difference between the highest and lowest values
Numerical Order Numbers placed in order from smallest to largest
Outlier Not typical of the rest of the data Extreme values
Stem & Leaf Plot Made up of a stem and leaf Ordered in ascending order ( smallest to largest)
Nominal Need sub-groups to complete the description eg: hair colour: blonde, brown, red
Ordinal Need a ranking to order the description, such as achievement levels eg: very high, high, satisfactory
Continuous Measured in a continuous decimal scale eg: temperature, decimal, length
Discrete Counted in exact values eg: shoe size, goals scored
Qualitative Data which is placed in categories, non-numerical form eg: hair colour, type of car
Quantitative Data which are in numerical form eg: height, length, number of children
Created by: Tania L Kremers
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