Lessons & Questions on: A1

pr070725v[1]

Activities Following “Percentages, the Swiss Army Knife of Comparison”

Posted by & filed under , .

Questions: 1. Rick Santorum, a candidate for the 2012 Republican nomination, claimed that “62 percent of kids who go into college with a faith commitment leave without it.” [Source: http://bit.ly/A77XED] What is being explicitly compared here? Is it a longitudinal or cross-sectional comparison? If 62 percent is the “part”, what is the “whole”? 2. Of [...]

4381325458_ebe8a27d5c_z[1]

Weighted Means & Standardization

Posted by & filed under , .

  You probably already know about and have used weighted means — they are one of the most popular ways for professors to calculate grades. For example, if quizzes are going to be 30% of the grade and the midterm + final is going to be 70% of the grade then if your grades look [...]

4963409391_b56582026a_o[1]

Activity: CEO Pay Infographic

Posted by & filed under , , .

Via http://www.flickr.com/photos/gdsdigital/4963409391/sizes/o/in/photostream/ Click on the graphic to enlarge.   IN this graphic, the association is made that the more people were laid off at a company, the bigger the salary. That seems like we are rewarding incompetence! What might be a confounding factor? What should be taken into account to fix the comparison? Hint: ptgaeocfiszeoynmtp If such [...]

europe and us

Activity: French Billionaires

Posted by & filed under , .

From Forbes: Bringing Up Bebe? No Thanks. I’d Rather Raise a Billionaire Quick: Name a French billionaire. Now name one who is self-made. A bit harder, non? According to the Forbes World’s Billionaires List, published today, France has sixteen billionaires. The U.S. boasts far more: 425. And a great number of those American billionaires, from Bill Gates (No. [...]