S1 Unit 3: Correlation and Regression (Edexcel IAL)

A complete, original teaching unit for Unit 3 of the Pearson Edexcel International A Level Statistics 1 (WST01) specification. Two lessons cover scatter diagrams, Sxx, Syy, Sxy and the product moment correlation coefficient; and the least squares regression line, interpretation in context, interpolation and extrapolation, and coded data. Each lesson opens with a starter, then has an editable PowerPoint with worked examples, scatter graphs, practice with answer slides, exam technique, speaker notes and an exit ticket, plus a worksheet with full answers. Also includes a 40-mark unit assessment with a detailed mark scheme and a teacher guide that maps every lesson to real WST01 past-paper questions (referenced, not reproduced). All PDFs in A4 .

Who it’s for: teachers and tutors of students taking Statistics 1 (WST01) for the Pearson Edexcel International A Level. Mathematical expressions on the slides are typeset images (LaTeX source in the alt text); all other text is editable. Every printable comes in A4 and US Letter. All content is original; Pearson and Edexcel are trademarks of Pearson Education, which has not endorsed this resource.