Carrying out a survey

I wouldn't recommend basing your IA on data collected wholly from surveys. However, it is a good way to collect a lot of data quickly.

If you are going to do this, please consider how many people you will be questioning and justify your sample size statistically. A good starting point is to use a proprietary sample size calculator like the one in the link below:

https://www.surveysystem.com/sscalc.htm 

Internal Assessment Marking Criteria

ESS Internal Assessment by Michael Smith on Scribd

Statistical Analysis in the IA

Guide to Writing Up Practicals

This guide is no out of date as it refers to the old criteria. However, I'm leaving it here because it still contains some good advice about how to produce a good piece of scientific writing. Please make sure you are using the new criteria for your reports.

IB Environmental Systems Write Up Guide

Carrying Out a T-Test Using Excel

Statistical Analysis

Statistics for ESS