Embedded Files
Here is a step-by-step guide to the processes you need to take to learn this topic.
Here is a step-by-step guide to the processes you need to take to learn this topic.
- Know what inference topic is about
- Explore the context/background story of your chosen data set for a practice assessment
- Pose your comparison question
- Take a sample from the data
- Use the data set of your chosen data to produce a pair of comparative box/dot plots
- Write a comparison paragraph between the two groups
- Calculate the informal confidence interval (ICI) & discuss observations to assist you in making an informal inference
- Write a conclusion paragraph
- Write evaluation paragraphs
- Consult the exemplars, NCEA Standard, Marking Rubrics and writing frames report structure to ensure that you know what you need to do to get success in your final report!
1: Inference in General
1: Inference in General
Here is an overview of Inference, along with resources you can use throughout the unit.
Here is an overview of Inference, along with resources you can use throughout the unit.
PPDAC.pdfAdditional Resources to help with this standard
Additional Resources to help with this standard
Jamie Sneddon Inference website - a very good resource!
Website created by Liz Sneddon with more resources - workbooks and videos
2: Datasets
2: Datasets
These are the datasets that are available to use for practice to create graphs and practice your writing skills for the report.
These are the datasets that are available to use for practice to create graphs and practice your writing skills for the report.
Dataset to use for practice
Dataset to use for practice
Use the Dataset Information to find out where the data has come from and what the numerical & categorical variables are
Step 3: Posing your Comparison Question
Step 3: Posing your Comparison Question
This will support you writing a question to the required standard.
This will support you writing a question to the required standard.
Step 4 & 5: Sampling / Creating Graphs
Step 4 & 5: Sampling / Creating Graphs
Choose a dataset above to practice creating the required graphs needed for this assessment.
Choose a dataset above to practice creating the required graphs needed for this assessment.
Written Notes
Written Notes
Sampling Methods (SLC)
iNZight lite instructions - random sample and graphing
Videos
Videos
Using iNZight lite to take a Simple Random Sample and calculate informal confidence intervals
Step 6: Comparision Paragraph
Step 6: Comparision Paragraph
This is for analysing the graphs, including the Shape, Centre, Spread & Special Features.
This is for analysing the graphs, including the Shape, Centre, Spread & Special Features.
Step 7: Informal Confidence Intervals (ICI)
Step 7: Informal Confidence Intervals (ICI)
Calculating the ICI and being able to comment about the observations that you see in regards to the ICI.
Calculating the ICI and being able to comment about the observations that you see in regards to the ICI.
Step 8: Conclusion
Step 8: Conclusion
Making the call
Making the call
It is necessary to answer your investive question.
Look at the overlap of the ICI lines - do they overlap or not?
If the ICI lines / number overlap each other, then there is not enough evidence to be able to make a call if the median will be will the range in the main population
If the ICI lines / number are separated from each other, then there is enough evidence to be able to make a call if the median will be will the range in the main population.
Step : Evaluation
Step : Evaluation
Notes
Notes
Needs to be completed for Achieved
Sampling Variability (Liz Sneddon)
For Merit / Excellence
What would happen for a bigger sample
Would you look at a different question
Does your findings reflect any research you have completed
Are there any subgroups that you could look into
Step 10: Exemplars
Step 10: Exemplars
Keys Elements for report - Check list to ensure that you have everything required for the report
Exemplars
Exemplars
NZQA exemplars (with commentary)
University Student Life (achieved and merit exemplar)
Practice Tasks Datasets & Information
Practice Tasks Datasets & Information
91264 Screencast exemplar (under 6 mins).webmExemplar Screencast
Exemplar Screencast
(Less than 6 minutes long)
Screencast - full investigation how to.webmScreencast - full investigation instructions
Screencast - full investigation instructions
If you want to get the full "how to" - almost 17 mins long!
NZQA Bits and Pieces
NZQA Bits and Pieces
Achievement standard (version 2)
TKI exemplar tasks - look for Mathematics 2.9 (AS91264)
Report abuse