# GCSE Statistics

Mind Map by , created over 5 years ago

## What you need to revise for the GCSE statistics exam - some of the nodes have little notes attached with tips and reminders

1834
11
0
 Created by Felix Ulrich-Oltean over 5 years ago
Edexcel GCSE Maths Specification - Algebra
TYPES OF DATA
FREQUENCY TABLES: MODE, MEDIAN AND MEAN
Girls' and Boys' Education - A Mind Map
Science Revision - Year 10
SAMPLING
GROUPED DATA FREQUENCY TABLES: MODAL CLASS AND ESTIMATE OF MEAN
Circle Theorems
Surds
GCSE Edexcel Mathematics (9-1) formulae
GCSE Statistics
1 Collecting Data
1.1 Sampling methods
1.1.1 Stratified
1.1.2 Systematic
1.1.2.1 Random starting place, every nth person where n is pop / sample
1.1.3 Random
1.1.3.1 Every item has an equal chance
1.1.3.2 Using random number tables
1.1.4 Quota
1.1.5 Key words: sampling frame, sampling unit, census, population
1.2 Capture / recapture is just two equiv fractions

Annotations:

• tagged    tagged in recapture ---------  =  --------------------------- total               recapture size
1.3 Surveys
1.3.1 Suitable questions (open/closed)
1.3.2 Pilot surveys
1.4 Data types
2 Graphs and Charts
2.1 Histograms
2.2 CF / boxplots
2.2.1 Skew
2.2.2 Outliers
2.3 Choropleth
2.4 Comparative pie charts

Annotations:

• Remember to comment on the proportions (angle of slice) and the actual numbers (area)
2.5 Stem and leaf digrams
2.6.1 Axes
2.6.2 Labels
2.6.3 Thickness / colour
2.6.4 3D effect
3 Processing Data
3.1 Standard deviation
3.2 Mean
3.2.1 Use midpoints when data is grouped
3.3 Median/Quantiles by Interpolation
4 Correlation
4.1 Spearman's Rank
4.1.1 Tied ranks
4.1.2 Interpreting the result
4.2 Line of best fit
4.2.1 Equation of the line (gradient / intercept)
4.2.2 Make predictions
4.2.3 Extrapolation
5 Time
5.1 Index numbers

Annotations:

• Get the scale factor or multiplier by doing: eventual value / original value
5.1.1 Chain-based
5.1.2 Base year
5.1.3 Weighted
5.2 Time series table and graph
5.2.1 Moving averages
5.2.2 Trend line
5.2.3 Seasonal variations
5.2.3.1 Mean seasonal variation / seasonal effect
5.2.3.1.1 Predict future value
6 Probability
6.1 Venn diagrams

Annotations:

• Work from the inside out - remember P(A) is the probability of the whole A circle. Also, remember the box and the number of items outside the circles.
6.2 Tree diagrams
7 Distributions
7.1 Normal
7.1.1 Features, percentages
7.1.2 QA charts, warning, action limits
7.2 Binomial
7.3 Discrete uniform