A-Level Edexcel Stats Maths Videos

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General

Past Paper Questions by Topic

Formulae Booklet

Representing Data

Mean

Mean for discrete data

Calculating the mean from frequency tables

Casio fx calculators: mean from frequency table

Median and Quartiles

Finding the median and quartiles

Cumulative frequency curves

How to interpret class intervals

Estimating the median from a frequency table

Standard Deviation

Standard deviation from frequency tables

Statistical Diagrams

Stem and leaf diagrams

Box and whisker plots

Finding the width and height of a class interval on a histrogram

Probability

Tree Diagrams

How to draw tree diagrams

Probability tree diagrams and independant events

Combining probabilities - mutually exclusive events

Dependent events

Dependent events - example

Conditional probability in tree diagrams

Conditional probability example

Venn Diagrams

What is a Venn diagram?

Problems involving 3 sets

Algebraic type problem involving 3 sets

Notation and symbols used in Venn diagrams

Shading regions

Probability in Venn diagrams

Conditional probability in Venn diagrams

P(A∪B) and mutually exclusive events

Two Way Tables

Using two way tables with probability

Independent, Dependent and Mutually Exclusive Events

Probability Laws and Definitions

Discrete Random Variables

Discrete Probability Distributions

Probability distribution tables

Binomial Distribution

Formula for Binomial distribution

Binomial distribution example qestions

Binomial probabilities on a calculator - evaluating P(X=x) for X~B(n,p)

Binomial probabilities on a calculator - evaluating P(X≤x) for X~B(n,p)

Cumulative probability tables for p ≤ 0.5

Cumulative probability tables for p ≥ 0.5

Mean and variance

Normal Distribution

Normal Distribution

Standard normal distribution: Z~N(0,1)

Normal cumulative distribution function

Inverse normal function to find observed values

Casio fx calculators: calculating probabilities for Z~N(0,1)

Calculating probabilities from a normal distribution

Calculating P(X<x) where x>μ

Calculating P(X>x) where x>μ

Calculating P(X>x) where x<μ

Calculating P(X<x) where x<μ

Calculating the mean and standard deviation

Finding the mean using tables

Finding the mean given a percentile

Finding the standard deviation using tables/calculator

Finding both the mean and standard deviation

Correlation and Linear Regression

Correlation

Pearson's Product Moment Correlation Coefficient using a Casio calculator

Pearson's Product Moment Correlation Coefficient - the formula

Hypothesis testing for zero correlation

Regression

Least squares method

Regression for y on x on a Casio calculator

Calculating a regression line without the calculator statistics function

Meaning of a & b in y = a + bx

Predictions and their reliability

Statistical Approximations

Normal Approximation to the Binomial Distribution

Continuity corrections

Normal approximation to the Binomial distribution

Hypothesis Tests

Binomial Distribution Hypothesis Tests

Test for a binomial proportion

Lower tail test

Upper tail test

Critical values method: lower tail test

Critical values method: upper tail test

Two tailed test