Comparison
Investigation
C. Liz Sneddon
Embedded Files
INVESTIGATIVE PROCESS
INVESTIGATIVE PROCESS
Comparison Investigation
Comparison Investigation
You will then select one numeric variable and one categorical variable and carry out a comparison investigation. At the end of this investigation, you must make an Inference.
PROBLEM
PROBLEM
Once you have identified what type of investigation you can do, the next step is to form a hypothesis, using contextual knowledge and a little research.
Exercise - Hypothesis.pdfExercise : Hypothesis
PLAN
PLAN
Taking a stratified sample with NZGrapher
Exercise - Plan.pdfDATA
DATA
ANALYSIS
ANALYSIS
SHAPE
SHAPE
When we analyse the shape, we are taking a step back and thinking about what shape the distribution is that this sample has come from. It is like standing at the back of the classroom and seeing the general pattern of the data on the board.
Analysis - Identifying Shapes.pdfIdentifyng and Justifying Shapes
Analysis - Shapes Exercises.pdfExercises : Shapes
CENTRE
CENTRE
Analysis - Comparing Centres.pdfSPREAD
SPREAD
Analysis - Comparing Spread.pdfOUTLIER
OUTLIER
When we look for outliers, you are looking for data that is a long way away from the rest of the data. For example, if ākonga with a height of 2 meters entered the classroom, their height would be unusual. Or if a person who was 100 years old entered the classroom, that would be unusual.
This is not one of the main patterns we look for, but if you notice an outlier, identify it.
Analysis - Outlier Examples.pdfOutlier: Examples
Analysis - Outlier Exercises.pdfOutlier: Exercises
CONCLUSION
CONCLUSION
Method 1: 1/2 - 3/4 Rule
Conclusion.pdf
Method 2: DBM & OVS Rule
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