# Statistics Query - Access Course

Discussion in 'Mathematics' started by chaos123, Jan 4, 2012.

1. ### chaos123

Hi,

I need some advice! I'm teaching an Access course, mainly statistics. The specification states "Know and understand how to conduct a questionnaire study and an observational study using appropriate terms."

We have covered questionaires, and now move on to observational studies.

Can anyone enlighten me on a precise definition of observational studies? Can anyone recommend any useful resources, as I am struggling to find anything of use?

Thanks,

2. ### chaos123

Hi,

I need some advice! I'm teaching an Access course, mainly statistics. The specification states "Know and understand how to conduct a questionnaire study and an observational study using appropriate terms."

We have covered questionaires, and now move on to observational studies.

Can anyone enlighten me on a precise definition of observational studies? Can anyone recommend any useful resources, as I am struggling to find anything of use?

Thanks,

4. ### chaos123

Yes, busy googling, but was hoping for some guidance as I am drowning in definitions!

5. ### lilachardyStar commenter

I would say it was gathering data by observation - for example, counting the number of people in queue, measuring the length of limpet shells on the beach, or observing the amount of time between accidents on the motorway.
Just guessing though.

6. ### GuishNew commenter

You use it when you can't use a random sample which is the perfect scenario for sampling. As you'd probably know, randomization frees us from bias.

That wiki link explains it: http://en.wikipedia.org/wiki/Observational_study