1. 3.5 Critical Analyses

2. Critical Analyses You may think that graphs and stats appear in print (newspapers, magazines, journal articles, are true and unbiased The opposite is often true. Media Outlets, companies, or certain groups sometimes skew the results of studies to influence the publics opinion or they may not have enough time or knowledge to accurately critique the data.

3. Factors to Consider When Assessing a Study Sample Size – a small sample size may not be representative of the population. Technique – sample type or analyses method may be inappropriate for the study. Extraneous Variable – The researchers should state any extraneous variables

4. Factors to Consider When Assessing a Study Bias – was the study conducted by an independent researcher or a special interest group Presentation of the data- graphs can misrepresent the data by: Changing the scale of the graph Displaying the graph in misleading way

5. A McDonalds Manager A Manager wants to know if an aptitude test accurately reflects employee productivity The Manager tests everyone The manager picks every 7 th employee and analyzes the sample ScoreProductivity 9878 5781 8283 7644 6562 7289 9185 8771 8176 3971 5066 7590 7148 8980 8283 9572 5672 7190 6874 7751 5965 8347 7591 6677 4863 6158 7855 7073 6875 6469

7. Analyses Manager gets a correlation coefficient of 0.98 Does this mean high test scores make highly productive employees?

8. The Bigger Picture

9. Advertising for School Advertising from Confederation College profile some of its graduates GraduateMonths TrainingSalary ($000) Sarah, Software Programmer985 Zack, Programmer663 Eli, System Analyst872 Johnny, Computer Technician552 Svetlana, Web-site Designer666 Mugatu, Network Admin460

10. Correlation Coefficient = 0.90

12. Bias in News

15. Meteorologist of the Year https://www.youtube.com/watch?v=3dYzXbGnWg8

16. Assignment Pg 209 #’s 1-4,5,8