# S1 Tutorials – Edexcel International A Level (IAL)

## Collecting Data

## Understanding population, census and samples

## Representing Data

## Mean

## Median and Quartiles

- Median, lower, upper quartiles and interquartile range for discrete data
- Exam Questions - Median, lower, upper quartiles and interquartile range for discrete data
- Cumulative frequency curves
- How to interpret class intervals
- Estimating the median, quartiles, percentiles from a grouped frequency table
- Exam Questions - Estimating the median from a grouped frequency table
- Exam Questions - Estimating the median from a histogram

## Standard Deviation

## Statistical Diagrams

## Probability

## Possibility Space (Sample Space)

## Tree Diagrams

## Venn Diagrams

## Independent, Dependent and Mutually Exclusive Events

## Discrete Random Variables

## The Normal Distribution

## The Normal Distribution

- The normal distribution
- The standard normal distribution Z~N(0,1) - Using tables or calculator
- Probabilities from a normal distribution using tables
- Exam Questions - Normal distribution, finding a probability
- Calculating the mean μ and standard deviation σ
- Exam Questions - Calculating the mean and standard deviation
- Exam Questions - Finding an observed value