1. ©G Dear 2008 – Not to be sold/Free to use
General Mathematics
Preliminary
Statistics
in Society
Quality Control
Privacy & Ethics
Stage 6 - Year 11
Press Ctrl-A
©G Dear 2008 – Not to be sold/Free to use

2. Quality Control (1/1) Example Solution Failed
Using Statistics to ensure the product is of the required standard.
To ensure product quality you will need to ensure that the required percentage meets the requirements.
Example
A batch of matches have their contents tested.
If more than 5% of the boxes have less than 50 matches then the batch is failed.
When 400 boxes are tested, 21 had less than 50 matches.
Solution 21
%Failed =
x 100%
= 5.25%
400
Failed

3. Some information may be considered too private to reveal for a survey.
Privacy and Ethics (2/3)
Some information may be considered too private to reveal for a survey.
On-Selling customer information is a common practice causing credit problems.
Some information, such as bank account numbers & passwords, can cause financial loss.
Other information, such as address and birthday can lead to identity theft.

4. Statistical Organisations (3/3)
Public
Private
ABS
United Nations
WHO