Level 3 Bivariate Data Learning Workbook covers NCEA Level 3 Achievement Standard 91581: Investigate bivariate measurement data (Statistics 3.9). This standard is internally assessed and worth 4 credits. The workbook features: concise theory notes with brief, clear explanations worked examples with key concepts and skills explained relevant sets of exercises for student practice answers to all exercises (provided in the back of the book) practice assessment task with fully worked solution. An index gives easy access to important terms and definitions highlighted in the text. This workbook covers the investigation of bivariate measurement data, according to the statistical enquiry cycle. A purpose for the investigation is developed through research, and a relationship question is posed. The data is displayed, and an appropriate model found for the relationship between the variables. The nature and strength of the relationship are discussed in context, and the model is used to make predictions. Statistical and contextual knowledge are used to communicate findings in a conclusion. This write-on workbook may be used by teachers for classroom practice, or by students as a homework book or revision guide. The write-on format keeps notes and exercises together in a compact form, providing a useful end-of-topic revision tool.