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This standard is worth 4 credits and is about investigating "Bivariate" Data - the relationships between 2 continuous variables, and fitting a model to the data to make predictions. Follow the steps below to understand the process and allow it to guide you to success!
An introduction and revision of what bivariate data analysis is used for.
An introduction and revision of what bivariate data analysis is used for.
Work through this section to make sure you understand the ideas within!
Work through this section to make sure you understand the ideas within!
We recommend 5 weeks (MAX) to write the report and 2 weeks at the beginning to work your way through this intro section.
We recommend 5 weeks (MAX) to write the report and 2 weeks at the beginning to work your way through this intro section.
Using Bivariate Data to be critical citizens - Investigate the world we live in - what is the Story about the world that the data is telling? Bivariate Data is used to analyse relationships between quantatative variables.
Watch this video by the late Hans Rosling to remind you what scatter graphs are and how they work.
Watch this video by the late Hans Rosling to remind you what scatter graphs are and how they work.
Hans Rosling - the best stats you've ever seen
If you want to play with the software and data sets from the video they are found here: Gap Minder Tools
The first outlines the key sections of a typical Bivariate report. Some of these ideas may be familiar from Year 11.
The first outlines the key sections of a typical Bivariate report. Some of these ideas may be familiar from Year 11.
91581 Bivariate KEY ELEMENTS .pdfThis one describes the analysis section in a little more detail and provides an opportunity to practice your own ideas with some given scenarios.
This one describes the analysis section in a little more detail and provides an opportunity to practice your own ideas with some given scenarios.
Bivariate Data notes (based on uni notes).pdfThis video acts well as a 'one-stop-shop' overview of how Bivariate Data works. Watch it slowly and pause it regularly to make notes and do the activities.
Datasets to play with and technical help...
Datasets to play with and technical help...
While you are learning this topic you may find yourself wanting to practice the ideas in the videos or slides. Use an of these data sets to do this and watch the videos below to learn how out Stats tool 'iNZight' works.
For choosing variables and beginning to visually describe plots
GOING CRACKERS Dataset and Starter task
Other datasets with context files - see Google Drive folder linked below
For considering alternative models MEN'S MARATHON TIMES and CARS INFO
Fully scaffolded investigation
Fastfood Nutrition task with context and data
Using the tech:
Using the tech:
iNZight Instructions for Bivariate Data
iNZight Lite instructions
Assessment Information
Assessment Information
Traditionally this assessment has been written as a Statistical report with referencing. but at ASHS, you may choose to write a report, present a Ted Talk type seminar with accompanying graphs, produce a PODCast or series of videos or another mode in discussion with your teacher.
You MUST include research and referencing to meet the standard, so there needs to be evidence of this whatever your choice.
If you are in 3MAS, you may also choose to combine your internal with the Inference internal by analysing the same data from two perspectives.
Possible practice Internal - Fast food snack - Purpose brief (READ THIS to develop a clear purpose)
1: Starting the Report (Sections 1 & 2)
1: Starting the Report (Sections 1 & 2)
AND
2: Writing the Purpose and Plan (Sections 3 & 4)
You will write your internal report 'inside out' and then put it back together in the correct order at the end. When you have a good understanding of the process you will need to undertake your teacher will set you the task in Classroom and you can begin.
You will start with scanning the dataset for relationships that look promising and doing a visual 'TARSOG' analysis of the graph and the variables you have chosen.
Use the videos below to help you understand the types of things you should be commenting on in this section.
3: Fitting a Model = Regression (Section 5)
3: Fitting a Model = Regression (Section 5)
How to use iNZight lite to fit models (5 mins - straight forward explanation)
Using iNZight to fit models and further refinement (20 mins - lots of detail for E!)
Bivariate in iNZight including further analysis.webm4: Making Predictions & Refining Models if necessary (Section 6)
4: Making Predictions & Refining Models if necessary (Section 6)
5: Writing Conclusions & Evaluations (Section 7)
5: Writing Conclusions & Evaluations (Section 7)
Exemplars & Schedules
Exemplars & Schedules
NZQA Exemplars - watch these, some are VERY out-dated!
Combined Standards Exemplars (for 3MAS ONLY)
Combined Standards Exemplars (for 3MAS ONLY)
Extra Resources that may be of use
Extra Resources that may be of use
Achievement Standard from NZQA
Nayland College site on Bivariate Data
Liz Sneddon website
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