Chapter 7: Investigating Data

Sarah L
Mind Map by Sarah L, updated more than 1 year ago
Sarah L
Created by Sarah L about 5 years ago
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8 Maths Mind Map on Chapter 7: Investigating Data, created by Sarah L on 07/27/2015.
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Chapter 7: Investigating Data
1 Mean and mode
1.1 mean = sum of scores/ number of score
1.2 Mode=most frequent score
2 Organising and displaying data
2.1 Graphs
2.1.1 Column
2.1.2 Secto
2.2 Tables
2.3 Charts
2.3.1 Pie chart
3 Types of Data
3.1 Categorical
3.1.1 Groups in categories
3.2 Numerical
3.2.1 Numbers
3.2.2 Discrete
3.2.2.1 distinct values
3.2.3 Contiuous
3.2.3.1 not exact
3.2.3.1.1 decimal points
4 Median and range
4.1 median= middle score( in order)
4.2 range= highest score- lowest score
5 Analysing frequency tables
5.1 fx colum= score x frequency
6 Dot plots and Stem and leaf plots
6.1 Dot plots show cluster and outliers
6.2 Stem and lea plots show modes, clusters and how the scores are spread out
7 Frequency histograms and ploygons
8 Sampling
8.1 Sample
8.1.1 selection of people
8.2 Census
8.2.1 whole population
8.3 random sample
8.3.1 NOT biased
8.3.1.1 =not opiniated questions
9 Designing survey questions
9.1 simple
9.2 not biased
9.3 easy to answer
9.4 not too long
10 Analysing data
10.1 Mean
10.1.1 affected by outliers
10.1.2 *best when no outliers
10.2 Mode
10.2.1 not affected by outliers
10.2.2 *best when most common score is needed
10.3 Median
10.3.1 not affected by outliers
10.3.2 *when data has outliers
10.4 Range
10.4.1 *when a measure of spread is needed
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