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Statistical investigations
Students gain a better understanding of the statistical investigative process when they initiate, design and undertake entire investigations of their own. In the first instance, this is best undertaken in groups.
A statistical investigation involves:
 choosing a context, and then the specific aspects that interest each group
 identifying the variables and the subjects of the investigation
 planning and carrying out the procedures for data collection to obtain random, fair and representative data
 exploring, summarising and representing the data
 analysing, making inferences based on the data, and preparing a report.
Depending on how familiar you or your class are with conducting statistical investigations, you might choose to:

model an investigation
This is a highly structured approach that provides students with an example of the features and purpose of the steps involved. 
provide a task that is a semistructured investigation
The basic outline of the investigation is determined by the task but students are required to make some choices relevant to the context.  allow students to initiate, design and undertake investigations that interest them.
Examples of student data investigations can be found in the TIMES module, Data Investigation and Interpretation 10.
Modelling statistical investigations
Model the steps of a statistical investigation by using a highly structured approach.
Semistructured statistical investigations
Using semistructured tasks can scaffold the development of students unfamiliar with the statistical investigative process.
Undertaking statistical investigations
Students gain a better understanding of the statistical investigative process and are more engaged when they undertake investigations of their own.