# First steps

These resources are designed to help you refresh your knowledge or get going with statistics for the first time.

On
Video Written Resouce Exercise

#### Types of data

Introduction

Categorical vs numerical data

Nominal, ordinal, continuous

MASH guide to types of data  Online exercises

#### Mean, median and mode

Mean, median and mode from lists

Maths Centre guide

Corbett Maths exercises

Online exercises

Frequency Tables and Grouped Data

Calculating the mean from tables

Calculating the mean (grouped data)

Calculating medians from tables

Calculating medians (grouped data)

Maths Centre guide

Online exercises

Calculating the mean

Estimating the mean

Calculating the median (frequency table)

linear interpolation

Range and interquartile range

Range and mid-range

Range and interquartile range

Online exercises
Introduction to standard deviation

Standard deviation explained

A very first introduction by MASH

Practice problems

#### Data display

Data display principles

Five data storytelling tips

Displaying data

What graph should I use?

Graphics principles cheat sheet

Online Stat Book exercises

Online Exercise - Interpreting a table

Bar Charts

Representing data

Online Stat Book webpage

Corbett Maths exercise
Histograms

MASH Video on Histograms

Online Stat Book Webpage

Corbett Maths Exercise

Exam Solutions exercises

Online Exercise

Pie charts

Pie charts

Math Is Fun webpage

Corbett Maths exercises
Scatter graphs

Math Is Fun webpage

Corbett Maths exercises
Boxplots

Creating a boxplot

Corbett Maths exercises

Online Exercise (Drawing)

Online Exercise (Interpreting)

Line graphs

Online Stat Book webpage

Corbett Maths exercises

#### Contingency tables

Introduction

Video

Webpage

Corbett Maths exercises

Introduction

Statquest video

Webpage

#### Confidence intervals

Introduction

Online Stat Book video

Stat Book webpage

#### Skew

An introduction to skew

Shapes of distributions

What is skewness?