A survey of supporters is not representative

I’ve been surprised (well disappointed) that every major media outlet has reported on the CTU’s “Mood of the Workforce” survey, because it is no such thing.

It is not a representative poll of workers. It is not even a poll or survey of union members. It is:

The survey, the sixth ‘Mood of the Workforce’ conducted annually by the CTU, gathered 2000 responses. Responses were from people who responded to an email from the CTU to a random selection of 50,000 people from the CTU’s ‘Together’ email list. 

The email list is a database of people the CTU had contacted with over the last seven years via petitions, parliamentary submission calls, community events, and fundraising for community causes.

So this is a list of supporters and activists associated with the CTU. It is no ways represents the “worker”.