The most important information we have

The Standard

The standard is based on the NZC.
Senior Secondary TKI AO-S8-3
NZC Relationship Claims
Page 57-58 PINK Course Book.

NZC Margin of Error
Page 90-94 PINK Course Book.

NZC Margin of Error
Page 95-98 PINK Course Book.

The Sample Paper


ONE Issue
The New Zealand Curriculum introduces ONE rule of thumb.
But is being updated to include three
The sample paper uses TWO rules of thumb.
We are learning THREE rules of thumb.
A document I found helped me

Dr Nic from http://statslc.com/
which I highly recommend




Update: 2nd September.

This document on TKI is being reviewed and updated along with a number of others.
The 3 'rules of thumb' are not beyond L8 NZC (2007).
This document was developed in 2007 in the bounds of MiNZC (1992) with the draft NZC (2007) being phased in.
3 types of claim and rules of thumb (MoE – margin of error)
Single poll/survey % MoE ≈ 1/(√n):
Comparison within one group MoE for the difference ≈ 2 x MoE:
Comparison between independent groups MoE for the difference ≈ 1.5 x Average MoE.

3.12 correction NZC.jpg
is page 95 to 98 of your Pink Book.
You should read this - this is NOT beyond the scope of level 8 - it is IN THE EXTERNAL!

Record of the issue: prior to clarification

Making sense of where the line is drawn:

Beyond the scope of level eight? That is what this document says!
Comparing two poll percentages from two independent samples - beyond level 8
Comparing two poll percentages within the same sample - beyond level 8
http://seniorsecondary.tki.org.nz/Mathematics-and-statistics/Achievement-objectives/AOs-by-level/AO-S8-3
Interpreting margins of error:
The approach here is new to the statistics curriculum.
It is based on making informed approximations or rules of thumb to interpret reported margins of error and is linked to confidence intervals.
Explains the connections among sample, population, sampling variability, sample size, confidence level, and poll percentages in relation to the reported margin of error.
Estimates the margin of error for subgroups of the poll percentages.

Conclusion

You DO have to calculate margin of error for subgroups.
You DO NOT have to compare two groups.
BUT: the exemplar expects you to compare!
So learn ALL the rules of thumb!

Revisiting Issue with an Interested Party

3.12 correction NZC 2.JPG