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Comparing Techniques For Collecting Data On Primary And Secondary Sources

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STUDENT NAME: Bailey Jacobs EMAIL: bjaco50@eq.edu.au TEACHER: F Stevenson D Harman K Podlich A Brown Statistical Inferences Purpose: In this unit we have studied how to: • comparing techniques for collecting data in primary and secondary sources. • Making sense of the position of the mean and median in skewed, symmetric and bimodal displays to describe and interpret data. • Constructing histograms and back-to-back stem-and-leaf plots. • Calculate relative frequencies • Investigate data used and its validity Now it is your turn to demonstrate your fluency and understanding of these concepts in applying your knowledge from simple through to complex application in real life and theoretical contexts. Task Are we a typical Australian Year 9 class? In this task you will collect, process and compare data of body measurements from two groups: your mathematics class and an ABS CensusAtSchool sample. • Your teacher is looking for evidence of mathematical understanding, fluency and problem solving and reasoning abilities, not only correct answers. • When using a calculator, show enough working so that your teacher can see the method used. Content: • Identify everyday questions and issues involving at least one numerical and at least one categorical variable, and collect data directly from secondary sources. • Construct back-to-back stem-and-leaf plots and histograms and describe data, using terms including ‘skewed’, ‘symmetric’ and ‘bi-modal’.

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