Year+11+16th+August

=16th August 2011= =FAST TRACK: Pages 118 to 151 is all important. Today page 150 and 151.= Page 150 has alot in common with the excess breath alcohol story. =ON TRACK: Pages 123 to 161 is all important= There are no short cuts - you need to complete all the pages except for the actual simulations.

Today we discuss the lack of statistical literacy that some reporters have! This means when you watch or read News you should question its validity. =Drink driving law change and related statistics= Quote from TV3 News Sun, 14 Aug 2011 6:30p.m. By Rachel Tiffen =Figures released to 3 News by the police show that drivers aged under 20 caught drunk behind the wheel are well outnumbered by older drivers....Statistics gathered by police show from January 1 to the July 31, 3846 drivers aged 20 and under were caught with excess breath alcohol. That is well behind older drivers, 4837 between 21-30 and 4500 drivers between 31-50.=

=You Task: Investigate - is this true - what might be wrong with Rachels Maths?= Is this comparing like with like?

How many driver are under 20? Drivers aged 16,17,18,19 and 20 (5 years) How many drivers are between 21 and 30? Drivers aged 21,22,23,24,25,26,27,28,29 (10 years) Even when taking into account the number of years in each age bracket we get a different picture - but still not a real picture! We need to know the total number of drivers in each group, so we can compare percentages as well as totals.

More Info: @http://www.stats.govt.nz/ @https://www.police.govt.nz/resources @http://www.police.govt.nz/service/monthly-statistics @http://www.stats.govt.nz/tools_and_services/tools/tablebuilder/recorded-crime-statistics.aspx Table Builder CRIME! @http://www.alac.org.nz/research-resources/nz-statistics/road-traffic-crashes-and-deaths @http://www.tacsafety.com.au/jsp/content/NavigationController.do?areaID=12&tierID=1&navID=A9348A54&navLink=null&pageID=164