**Written for NCEA Level 1 2024 Curriculum**

**Authors : Geoff Ackerley, Wiesje Geldof, Katy Thorne**

**Total of 5 Credits - In****ternally Assessed**

This book contains notes, questions and practice investigations using Time Series Data as part of the **Time Series Data Investigation for 1.1 Statistical Enquiry Process**. A Time Series Investigation is one of the four options for the assessment of this standard, the other options are: Relationship Investigation, Comparison Investigation and Experimental Probability Investigation. This standard is internally assessed and is worth 5 credits.

Students are able to and encouraged to use appropriate technology, such as graphing calculators/software in their learning and assessment for this standard.

In this workbook students will find **clear explanations** and **detailed worked examples** showing the step-by-step processes that will be needed to solve each type of problem, these are followed by a large number of practice **exercises **and** problems **of increasing difficulty. At the end of the workbook there is are **Practice Investigations**. Candidates should use this to evaluate their strengths and weaknesses before the internal assessment.

A full set of **answers** is included, which acts as a guide to structuring quality answers. An abbreviated version of the Achievement Criteria and Explanatory Notes of the Achievement Standard itself complete the resource.

**Topics Covered by this Resource Include** :

**Defining the Problem **
**Plan the Investigation**
**Analyse the Data **
**Time Series Forecasting **** **
**Example Investigation **
**Practice Investigations **

The Sigma Workbook **'AS 1.1 Time Series Investigation' **is best bought before the standard is taught at school and used throughout this time as a classroom and homework resource. Alternatively, the workbook would make an excellent independent study resource in the lead-up to the internal assessment of Achievement Standard 1.1.

Once completed, **'AS 1.1 Time Series Investigation' **provides a useful set of revision notes at assessment time. It can be kept as a reference book if students intend taking a Year 12 mathematics course.