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TES: The largest network of teachers in the world

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## DON'T DRINK AND DRIVE!

## Drunk driving accidents make up nearly 30% of all the automobile fatalities each year. With such a high percentage of deaths resulting from the careless drinking habits of several drivers, it seems urgent that the people of America know and understand the impacts of their careless actions on their society. Every individual citizen has the ability to take responsibility for his or her own actions and make the choice to not drink and drive.

SKIP THE DRINK. SAFE A LIFE.Fortunately between 2006 and 2009, some states whether by government action, personal motivation, or just by coincidence have begun to take a stand and lower their number of drunk driving fatalities through the years. Others however, continue to show the same number of drunk driving fatalities each year, proving that the people in those states are not doing anything to counteract drunk driving. The following evidence below will support this claim.

*Expected Values were found by adding up the total drunk fatalities for years 2006-2009 and dividing it by 4. This number represents the number of drunk driving fatalities the state would experience if there was no change made from year to year.

STATES MAKING A CHANGE:*Chi-squared values were found by using the following formula:

((observed # of drunk driving fatalies - the expected # of drunk driving fatalities)^2) / (the expected # of drunk driving fatalities)

The chi-squared chart above proves that the people in the states above are taking a stand against drunk driving in their state. The high chi-squared value represented in the total column for each state proves that the number of drunk driving incidents each year is far off from expected. Since the expected number of drunk driving fatalities for each year from 2006-2007 (displayed in the large chart at the top of the page) is the same for all 4 years, a high chi-squared value indicates that the number of drunk driving fatalities is far off from the expected. When I looked at each of the states with high chi-squared values, I found that every one of these states experienced a drop in drunk driving fatalities over the 4 year span.

Thanks to these states ^ for making a difference. Keep up the good work :)STATES NOT CHANGING THEIR TREND:The chi-squared chart above proves that the people in the states above are

nottaking a stand against drunk driving in their state.The low chi-squared value represented in the total column for each state proves that the number of drunk driving fatalities each year is nearly the same as what is expected. With a number close to the expected number of drunk driving fatalities being seen every year, the state is not improving their numbers and bringing down the number of drunk driving fatalities seen in their state each year.Take a stand. Start making a difference.## Can you predict the # of drunk driving fatalities over a 4-year span?

http://drunkdrivingstats.wikispaces.com/Regression+and+Residual+Plot