Problem 3

  1. voluntary response

  2. Very little to no confidence in results being reprenitive since the data was gatehred from a single website and was not random.

Probelem 7

  1. Adults in the USA

  2. people who have used alterntive medicine and gained positive benefits

  3. the subscribers of Comsumer Unition

  4. People who replied

  5. Survey

  6. Not random since only subcribers and only people who replied, wo probably felt passionate

Problem 9

  1. Adults

  2. proportion who think drinking and driving is a seirous problem

  3. Poeple who go to bar

  4. every 10th person leaving bar

  5. systematic sampleing

  6. people who went to bar were asked about drinking and driving – clearly they will be biased since they might be drunk!!

Problem 14

  1. dairy milk

  2. proportion of milk thats not pure

  3. farms

  4. random milk samples

  5. SRS

  6. there is little bias clear in the question, but some may esist on which farms are selected to be inspected in the first place