tag:blogger.com,1999:blog-7718462793516968883.post5279549576173936722..comments2019-10-10T16:33:33.057-04:00Comments on MadMath: Interpreting Polls: A MadMath Open LetterDeltahttp://www.blogger.com/profile/00705402326320853684noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-7718462793516968883.post-15412417226795444892010-06-08T15:33:29.795-04:002010-06-08T15:33:29.795-04:00On all my statistics tests, I have 1 or 2 "co...On all my statistics tests, I have 1 or 2 "concept questions" like these (10 or 20% of the test) -- no number-crunching involved; define or explain why something would or not work out.<br /><br />Most people routinely get them wholly or partially wrong, this one is no different, and there's some significant amount of grief around all of them. But, I'm very consistent about it, so they always know it's coming (and I give out sample problems in homework and practice tests in advance, too). At this level, it's interesting that there's a sizable number of people who can crunch formulas mechanically, but are halfway frustrated at thinking about logical requirements in advance of the formulas being used. (Actually, just last night was my final exam -- for the equivalent question, even telling them in advance it would be from a particular chapter on the subject of the CLT, the vast majority still got exactly the opposite of the correct answer.)<br /><br />My class is moderately easy (all things considered), so in large part these questions make the difference between getting an "A" and a "B", and I'm comfortable with that.Deltahttps://www.blogger.com/profile/00705402326320853684noreply@blogger.comtag:blogger.com,1999:blog-7718462793516968883.post-77326179130140198452010-06-08T11:13:50.695-04:002010-06-08T11:13:50.695-04:00How do your students do on that question?How do your students do on that question?Sue VanHattumhttps://www.blogger.com/profile/10237941346154683902noreply@blogger.com