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Statbag is the personal website of Worth Swearingen, a high school math teacher

CP Stats: Sample report form · May 23, 06:23 PM

sample report2.doc


My answers to the 2008 test · May 19, 12:20 PM

Here are my answers.


Link to the Against All Odds case study · May 15, 08:20 AM

AZT case study


Augggggh! · May 2, 03:01 PM

PHANTOMS and PANIC are important. I’m posting a copy of my answer to question 5b (Night owls and early birds) along with a few comments. The grading rubric breaks the problem into these three parts:

Those three parts connect directly to our mnemonic like this:

Each part is either correct or incorrect; there is no partially correct to assign. Therefore, if you skipped the assumptions, you got part 1 wrong. If you didn’t conclude in context, you got part 3 wrong.

Well, I hope to see a lot of you tomorrow. Let’s fix this.


Quick fixes to drastically improve your score · May 1, 12:11 PM

I’ve scored everyone’s paper. I’ll give them back after questions 5 and 6, tomorrow. Prepare to use inference procedures.

As a class, your scores are a little — and I mean only a little — lower than I’d like to see. Using your average score on questions 1 through 4 as your scores on questions 5 and 6, the class median AP grade is a 3 with four 4’s, seven 3’s, three 2’s, two 1’s and 2 incompletes. A significant portion of you are near a border with the grade above.

A major part of low scoring is a lack of attention to detail. I can read between the lines to see that you essentially get something, but the scoring scheme doesn’t allow for much of that.

Here are my general comments about how each question went.

Question 1: Einstein vs. Newton on curvature of space

Question 2: Boot experiment

Question 3: New High School runners

Question 4: Commercial airlines