Posted by **Jill** on Saturday, October 15, 2011 at 6:01pm.

A researcher wants to attain a random sample of young drivers who have received DUIs within the last year. Using the PREP system, he asks all first year students at WLU who have received a DUI to volunteer for the study. Thirty-five students actually admit to having received DUIs. He assigns a number to each of these students and chooses 15 participants using a table of random numbers.

- Research Methods -
**Jill**, Saturday, October 15, 2011 at 6:02pm
Indicate which of the following sampling techniques are examples of random sampling. For those that are not examples of random sampling, explain why.

- Research Methods -
**Ms. Sue**, Saturday, October 15, 2011 at 6:04pm
What do you think?

- Research Methods -
**Jill**, Saturday, October 15, 2011 at 6:08pm
I think so, but once again.. the wording is confusing me..

- Research Methods -
**Ms. Sue**, Saturday, October 15, 2011 at 6:21pm
Didn't the students select themselves?

- Research Methods -
**Jill**, Saturday, October 15, 2011 at 6:24pm
well.. 35 students showed up.. but fifteen were only chosen.. which would then be a random sample? right..?

- Research Methods -
**Ms. Sue**, Saturday, October 15, 2011 at 6:27pm
Only 35 admitted to having a DUI. It's likely that many more had DUI's but didn't admit it.

Your sample is skewed.

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