Based on our two well-known Level 1 Mathematics Learning Workbooks, this book covers the internally assessed Level 1 Mathematics and Statistics Achievement Standard 1.11 (91036) - Investigate bivariate numerical data using the statistical enquiry cycle. It features brief notes, clear explanations, numerous worked examples and relevant exercises with answers. Use to support classroom work, to help with internal assessments and to revise for end-of-year exams.