Edexcel · 1ST0
Edexcel GCSE Statistics
34 topics and 486 questions, with Edexcel's specification references.
The two papers
- 1ST0/1 Paper 1. 80 marks, 90 minutes, calculator.
- 1ST0/2 Paper 2. 80 marks, 90 minutes, calculator.
Foundation (1ST0/1F and 2F) or Higher (1ST0/1H and 2H). Both papers cover all the content.
Planning and collecting data Edexcel Topic 1
- Edexcel 1a.01, Edexcel 1a.02, Edexcel 1a.03LessonPractice
The statistical enquiry cycle and hypotheses
- Name the five stages of the enquiry cycle and what happens at each
- Write a hypothesis that data can test
- Plan around constraints such as time, cost, ethics and confidentiality
- Edexcel 1b.01, Edexcel 1b.02, Edexcel 1b.03LessonPractice
Types of data and grouping
- Classify data as categorical, ordinal, discrete or continuous, qualitative or quantitative
- Weigh up grouping data into classes
- Name the explanatory and response variables
- Edexcel 1b.04, Edexcel 1d.01, Edexcel 1d.02LessonPractice
Primary and secondary data, reliability and validity
- Compare primary and secondary data
- Choose a collection method: experiment, survey, observation, census or reference
- Tell reliability from validity
- Edexcel 1c.01, Edexcel 1c.02, Edexcel 1c.03, Edexcel 1c.04, Edexcel 1c.05LessonPractice
Populations, sample frames and random samples
- Tell a population, a sample frame and a sample apart
- Take a simple random sample and a systematic sample
- Explain the bias risk in opportunity and judgement samples
- Edexcel 1c.03, Edexcel 1c.04, Edexcel 1c.06LessonPractice
Stratified and quota sampling
- Work out how many to take from each stratum
- Explain how quota sampling differs from a stratified random sample
- Choose a sampling method for a context and justify it
- Edexcel 1d.03, Edexcel 1d.04LessonPractice
Questionnaires, interviews and bias
- Spot leading, ambiguous and overlapping questions and fix them
- Compare open and closed questions and interview methods
- Reduce bias from sensitive questions
- Edexcel 1d.05, Edexcel 1d.06, Edexcel 1d.07LessonPractice
Cleaning data and controlling variables
- Find and deal with missing, mistyped and impossible values
- Use row and column totals to find a recording error
- Control extraneous variables, with control groups and matched pairs
Representing data Edexcel Topic 2a
- Edexcel 2a.01LessonPractice
Tables, two-way tables and pictograms
- Complete a two-way table from given facts
- Read and draw pictograms with a key
- Read published tables and pick out what matters
- Edexcel 2a.01, Edexcel 2a.03LessonPractice
Bar charts and pie charts
- Read dual, composite and percentage bar charts
- Work out pie chart angles and read frequencies from a pie chart
- Compare two pie charts of different totals
- Edexcel 2a.01LessonPractice
Stem and leaf diagrams and Venn diagrams
- Draw and read ordered and back-to-back stem and leaf diagrams
- Find the median and range from a stem and leaf diagram
- Fill a Venn diagram from counts
- Edexcel 2a.02LessonPractice
Population pyramids, choropleth maps and comparative diagrams
- Read population pyramids and compare two populations
- Read a choropleth map and its shading key
- Draw comparative pie charts with areas in proportion to totals (Higher)
- Edexcel 2a.03LessonPractice
Line graphs, time series and frequency polygons
- Read a time series graph and describe its trend
- Draw a frequency polygon at the class midpoints
- Compare two distributions with frequency polygons
- Edexcel 2a.03, Edexcel 2c.01LessonPractice
Cumulative frequency
- Build a cumulative frequency table and plot at upper class boundaries
- Estimate the median, quartiles and percentiles from the graph
- Estimate how many values lie above or below a given value
- Edexcel 2a.03, Edexcel 2a.04, Edexcel 2a.06 · Higher onlyLessonPractice
Histograms with unequal class widths
- Work out frequency density and draw a histogram
- Read frequencies from a histogram's areas
- Spot a histogram drawn with frequency instead of frequency density
- Edexcel 2a.05, Edexcel 2a.06, Edexcel 2a.07, Edexcel 2a.08LessonPractice
Choosing diagrams and spotting misleading ones
- Choose a diagram for the type of data and justify it
- Spot truncated axes, uneven scales and distorted sizes
- Move the same data between different diagrams
Averages and spread Edexcel Topics 2a to 2c
- Edexcel 2b.01, Edexcel 2b.02, Edexcel 2b.03LessonPractice
Mode, median and mean
- Find the mode, median and mean of a list
- Choose the best average for a context and justify it
- Work out how adding or removing a value changes the mean
- Edexcel 2b.01LessonPractice
Averages from frequency tables and grouped data
- Find the mean, median and mode from a frequency table
- Estimate the mean of grouped data from class midpoints
- Estimate the median of grouped data by interpolation
- Edexcel 2b.01, Edexcel 2b.02 · Higher onlyLessonPractice
Weighted mean and geometric mean
- Work out a weighted mean
- Work out a geometric mean and use it for growth rates
- Explain when the geometric mean beats the arithmetic mean
- Edexcel 2c.01, Edexcel 2c.04LessonPractice
Range, quartiles, interquartile range and percentiles
- Find the quartiles and interquartile range of a list
- Work out percentiles and the interdecile range
- Compare spread in context
- Edexcel 2a.03, Edexcel 2c.02, Edexcel 2c.03LessonPractice
Box plots and outliers
- Draw and read box plots, and compare two
- Test for outliers with 1.5 interquartile ranges (Higher)
- Decide whether an outlier is an error or a genuine value
- Edexcel 2c.01, Edexcel 2c.04, Edexcel 2c.05, Edexcel 2c.06 · Higher onlyLessonPractice
Standard deviation and standardised scores
- Work out the standard deviation of a list and a frequency table
- Compare data sets with mean and standard deviation
- Standardise scores to compare across two tests
- Edexcel 2a.09, Edexcel 2a.10, Edexcel 2c.05LessonPractice
Skewness and comparing distributions
- Spot positive and negative skew from a diagram or the averages
- Work out a skewness value from a given formula (Higher)
- Compare two distributions on average, spread and shape in context
Correlation, trends and index numbers Edexcel Topics 2d to 2f
- Edexcel 2e.01, Edexcel 2e.02, Edexcel 2e.03LessonPractice
Scatter diagrams, correlation and causation
- Describe correlation as positive, negative or none, strong or weak
- Tell correlation from causation and spot a third variable
- Tell interpolation from extrapolation and judge each
- Edexcel 2e.04LessonPractice
Lines of best fit and regression lines
- Draw a line of best fit through the double mean point
- Read and use the regression line y = a + bx (Higher)
- Interpret the gradient and intercept in context
- Edexcel 2e.05, Edexcel 2e.06, Edexcel 2e.07, Edexcel 2e.08 · Higher onlyLessonPractice
Spearman's rank and Pearson's correlation coefficients
- Rank two variables and work out Spearman's rank correlation coefficient
- Interpret a coefficient between -1 and 1 in context
- Explain when Spearman's and Pearson's differ
- Edexcel 2f.01, Edexcel 2f.02LessonPractice
Moving averages and seasonal variation
- Work out 4-point moving averages and draw a trend line
- Work out the mean seasonal variation (Higher)
- Predict a future value from the trend and the seasonal variation
- Edexcel 2d.01, Edexcel 2d.02LessonPractice
Index numbers and rates
- Work out and read simple and chain base index numbers
- Work out a weighted index number (Higher)
- Work out crude and standardised rates from a formula
Probability and distributions Edexcel Topics 2g and 3
- Edexcel 3p.01, Edexcel 3p.02, Edexcel 3p.03, Edexcel 3p.04, Edexcel 3p.05, Edexcel 3p.06LessonPractice
Probability, expected frequency and risk
- Estimate probabilities from relative frequency
- Work out expected frequencies
- Work out and compare absolute and relative risk
- Edexcel 3p.07LessonPractice
Sample spaces, two-way tables, Venn and tree diagrams
- List outcomes in a sample space diagram
- Find probabilities from two-way tables and Venn diagrams
- Use the addition rule for mutually exclusive and general events
- Edexcel 3p.08, Edexcel 3p.09LessonPractice
Independent events and conditional probability
- Use P(A and B) = P(A) × P(B) for independent events
- Work out conditional probabilities from tables and trees
- Test whether two events are independent
- Edexcel 3p.10, Edexcel 3p.11 · Higher onlyLessonPractice
The binomial distribution
- Check the conditions for a binomial model
- Work out binomial probabilities for small n
- Compare observed results with a binomial model to judge bias
- Edexcel 3p.12, Edexcel 3p.13, Edexcel 2g.02 · Higher onlyLessonPractice
The Normal distribution and quality assurance
- Describe the shape of a Normal distribution
- Use the 68%, 95% and 3 standard deviation facts
- Set and read warning and action lines on a control chart
Estimation and sampling evidence Edexcel Topics 2g and 2h
- Edexcel 2h.01, Edexcel 2h.02LessonPractice
Estimating population totals and capture-recapture
- Estimate a population mean or proportion from a sample
- Scale a sample result up to a population
- Use the Petersen capture-recapture formula and state its assumptions (Higher)
- Edexcel 2h.03, Edexcel 2g.01LessonPractice
Sample size, reliability and sample means
- Explain why larger samples give more reliable results
- Explain why sample means spread less than single values (Higher)
- Judge a conclusion by the sample it came from