Edexcel (IAL) S1 Past Papers
Doing past papers is always regarded as a necessary step to gaining confidence. I have put up a range of Edexcel IAL S1 Statistics past papers with links to the mark scheme and examiners reports to help with your maths revision and help you gain the grade you deserve.
I would encourage you to only look at the worked solution / mark scheme after you have attempted the past paper question and/or looked at any accompanying tutorials.
At the end of the specification you will see a section on notation used that I would also encourage you to look at and familiarise yourself with.