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Chapter 7: Investigating Data
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8 Maths Mapa Mental sobre Chapter 7: Investigating Data, criado por Sarah L em 27-07-2015.
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maths
statistics
data
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8
Mapa Mental por
Sarah L
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Criado por
Sarah L
mais de 9 anos atrás
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Resumo de Recurso
Chapter 7: Investigating Data
Mean and mode
mean = sum of scores/ number of score
Mode=most frequent score
Organising and displaying data
Graphs
Column
Secto
Tables
Charts
Pie chart
Types of Data
Categorical
Groups in categories
Numerical
Numbers
Discrete
distinct values
Contiuous
not exact
decimal points
Median and range
median= middle score( in order)
range= highest score- lowest score
Analysing frequency tables
fx colum= score x frequency
Dot plots and Stem and leaf plots
Dot plots show cluster and outliers
Stem and lea plots show modes, clusters and how the scores are spread out
Frequency histograms and ploygons
Sampling
Sample
selection of people
Census
whole population
random sample
NOT biased
=not opiniated questions
Designing survey questions
simple
not biased
easy to answer
not too long
Analysing data
Mean
affected by outliers
*best when no outliers
Mode
not affected by outliers
*best when most common score is needed
Median
not affected by outliers
*when data has outliers
Range
*when a measure of spread is needed
Anexos de mídia
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