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M 4/4/011
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HW due: Finish your book. (Most people are reading (How to Lie With Statistics, while a few
people are reading other, longer books that they chose.)
In class: Discussion of spring break reading. Some students who do especially
well in the discussion portion today may be exempt from the quiz tomorrow.
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T 4/5/011
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Quiz (10
pts.) on your spring break reading.
The purpose of the quiz is to spot-check that you did the reading. Since How to Lie With Statistics is a short,
easy read, and the other books are (at least in Mr. Hansen’s opinion) real
page-turners, you should have no trouble finishing your book.
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W 4/6/011
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HW due: 4/6: Questions #1-9 concerning AP formula
sheet (show work as needed). After doing all 9, check answer key and make
corrections in a different color. Then remember to log your points!
Fun item (optional): The story
of the missing dollar at a restaurant (yes, a restaurant).
Quiz (10 pts.) will cover your AP
formula sheet, including the standard error formulas on the third page.
The AP formula sheet is 7 pages long, and the pages are numbered 12 through
18 at the bottom of each page. However, if you wish to make a printout for
your own purposes, you will want to send pages 16-22 to the printer, since
there are 4 unnumbered pages at the beginning of the .PDF file.
We went through every single line on the formula sheet before spring break.
You were also provided, back in February, with a handout for the standard error formulas.
During the quiz, you will be provided with a copy of the AP formula sheet.
However, you may not use any notes of any type during the quiz. Here are a
few sample questions so that you have an idea of what to expect:
1. Explain the formula  .
2. Given that a LSRL passes through the point (0, 15), and given that the
explanatory and response variables have sample means of 12.5 and 6.2,
respectively, compute the slope.
3. Is the formula  of any value on the
AP exam? Explain briefly.
4. Explain the intended purpose of the formula  . Would you ever use it? Explain.
5. Explain why you would never use the formula  on the AP exam.
6. Give the name of the formula  and state any
restrictions on events A and B.
7. Explain which formula(s) to use for the s.e. in a 2-prop. z interval.
8. Explain which formula(s) to use for the s.e. in a 2-sample t test.
9. State which formula to use for the s.e. in a 1-prop. z test.
Answer Key: Click here and correct your answers. Please
write out all the answers first, and then make your corrections. Written work
that is too similar to the answer key, or that shows no evidence of errors
followed by corrections, will not qualify for full credit if your paper is
audited.
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Th 4/7/011
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HW due: Write any 6 multiple-choice questions from
the Barron’s AP review book, showing all work and showing corrections in a
different color for any you missed. Then, log your points.
In class: Jeopardy Bingo on the AP formula sheet. A quiz based on questions
from the Must-Pass Quiz is also
possible.
Congratulations to Chick F., who passed the MPQ on the first try! This is a
new record for the earliest pass ever.
People who pass the MPQ will receive more lenient scoring on any quizzes that
are based exclusively on MPQ questions, such as the one that may occur today.
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F 4/8/011
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HW due: Write #12
from the 4/14/2010 test and another 6 multiple-choice questions of your choice
from the Barron’s book, showing all work and showing corrections in a
different color for any you missed. Then, log your points.
In class: Another quiz based on the Must-Pass
Quiz is likely.
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M 4/11/011
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HW due: Write any free-response question of your
choice from one of the 6 sample exams near the end of the book. Set a timer
for 13 minutes. (If the question has multiple parts, be sure to do all of
them.) Then write another 6 multiple-choice questions of your choice from the
Barron’s book, showing all work and showing corrections in a different color
for any you missed. Then, log your points.
In class: Discussion of group project power computations; yet another quiz
based on the Must-Pass Quiz is
likely.
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T 4/12/011
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HW due: Again, write any free-response question of
your choice from one of the 6 sample exams near the end of the book. Set a timer
for 13 minutes. (If the question has multiple parts, be sure to do all of
them.) Then write another 6 multiple-choice questions of your choice from the
Barron’s book, showing all work and showing corrections in a different color
for any you missed. Then, log your points.
In class: Jeopardy Bingo, with a different set of answers. Remainder of
period will be review for Thursday’s test.
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W 4/13/011
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No class (Career Day).
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Th 4/14/011
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Test (100
pts.) over all material from the entire year. Some of the questions will come directly from the Must-Pass Quiz, some will test your
knowledge of the AP formula sheet, and some will be hybrid questions that
test your ability to assemble knowledge from more than one place. Sample questions and answers are
available. If you would like fully worked solutions, please read the
instructions on the sample question sheet.
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F 4/15/011
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No additional HW due today. Whew! (Yes, it would
have been even better if this had been posted by 3:00 p.m. However, as you
know, there is a general rule that if HW is not posted by 3:00 p.m.—or by
some reasonable hour on Friday evening, before the weekend begins in
earnest—then there is no HW assignment.)
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M 4/18/011
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HW due: Each group should prepare a draft list of
milestones for the experiment project. Target completion date for the entire
project is Friday, April 29, but if you need more time, please build that
into your schedule. The schedule is due today (April 18) but can be adjusted
later if necessary, as long as you keep Mr. Hansen informed of any changes in
a timely fashion.
Milestones should include, at a minimum, projected dates for each of the
following:
- Power analysis
- Final approval of methodology by Mr. Hansen
(allow 24 hours for turnaround)
- Data gathering
- First draft and table of raw data submitted
(Excel format preferred for raw data table)
- Final report
When designing your schedule, please remember that Monday, April 25, is a
holiday.
Group 1: Nick R.-S., Justin, Dominique
In an audio-only experiment, does the gender of voices
affect the likelihood that STA boys consider them to be “trustworthy”?
Group 2: Alex, Andrew, Phineas
By how much does knowing the type of material that will be
on a quiz or test improve the mean score?
Group 3: Daniel, Chick, Preston
Is students’ ability to distinguish between Pepsi and
Coca-Cola in a blind taste test better than chance alone would predict?
Group 4: Jamie, Julien, Brennan
Are all forms in the STA Upper School equally competent at
finding Waldo? In other words, is the proportion
of successful Waldo-finding within some number of seconds the same across forms?
This is a homogeneity-of-proportions  test. (Note:
This group originally phrased the research question in terms of the mean time
to find Waldo, but we can’t do that, since that would require ANOVA, which is
not on the syllabus.)
Group 5: Edward, Zeke, Jordan
Is the mean time freshmen estimate for a blind 150-second
wait larger than the mean time for seniors?
Group 6: Nick S., Tip, Andrei, Ousmane
Is fitness (as measured by pushups, situps, hand touches,
or some merged statistic) better for lacrosse/crew than for golf/baseball? (Note: As with group 4, we cannot
compare more than two groups of subjects unless we use ANOVA. Hence it would
be good to merge “more active” sports into one group and “less active” sports
into the other.)
Note also that groups 4, 5, and 6 are not really conducting an experiment,
since there is no treatment. For group 1, the treatment is gender of voice,
which is administered in two levels (male and female) to subjects in a
matched-pairs design. For group 2, the treatment is knowing the subject
matter in advance versus a control treatment of not knowing. For group 3, the
treatment is administration of either Coke or Pepsi as “drink A,” randomly
determined, with each subject serving as his own control (matched pairs). However,
for groups 4, 5, and 6, there is no treatment, only measurement of some
innate skill (Waldo-finding, time estimation) or physical attribute (fitness
level). However, since groups 4, 5, and 6 all have projects that lend
themselves well to or 2-sample t tests, the projects are deemed acceptable.
Each group must choose someone to deliver the draft milestone chart. If that
person is absent, a backup person must make the delivery; otherwise the score
for all group members is a 0.
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T 4/19/011
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HW due: Submit yesterday’s HW (the milestones) by
e-mail. Daniel’s group has already done this and does not need to do it a
second time. Then, start working on your power analysis worksheet (note
revisions to two of the research questions), and submit it by the date
declared on your milestone sheet, which is today in some cases. Each group
member should perform all steps, and spot checking of step #7 (PHASTPC plus
sketches) may occur for each student’s notebook. However, only one submission
of the worksheet will be collected for each group.
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W 4/20/011
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6:45 a.m.
(extra time) or 7:05 a.m. (regular time): Optional “Up to Half-Back” Test
(100 pts.) for students who did poorly on last Thursday’s test. All students who failed the first test will be
expected to sit for this test. If you are in the group of students whose
parents will be receiving a midquarter report, then a failure to show up for
the “half-back” test would definitely be noted on that midquarter report.
Your scores on the two versions of the test will be averaged. If you score
100% on the second try, you would earn back half the points you missed the
first time (hence the term “half-back”).
If, for some reason, your second score is lower than the first score, then
the second score will be discarded. In other words, the “half-back” test
cannot hurt you.
Format for the “half-back” test will be exactly the same as on the first
version: 40% straight from the MPQ, 40% straight from the AP formula sheet,
and 20% “hybrid” questions. Please see the 4/14 calendar entry for helpful
links to the MPQ, the third page of the AP formula sheet, and sample
questions.
In class: Group leaders will make an oral status report to Mr. Hansen. Most
of the class period will be spent working on group projects. Continue
executing the milestones on your plan.
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Th 4/21/011
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HW due: Work on group project.
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F 4/22/011
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HW due: On a separate, blank sheet of paper, answer 6
multiple-choice questions and 1 free-response question from your review book.
Record, for each question, the page number, problem number, and your work.
(Work can be cryptic for the 6 multiple-choice questions, since work there is
not graded. However, work for the free-response problem must be legible.)
Allow 26.5 minutes for this exercise, or 40 minutes if you have extended
time. There is no need to log your points, since this assignment will be
collected at the beginning of class. Score will be based on completeness and
the legibility of your free-response answers.
If you have time, it is a good idea to score your work, using the answer key
and scoring rubric in your review book. However, this step is optional.
In class: “Mini-AP Exam.” Scores
will be computed and reported, and if they are unusually low, they will be
reported to your parents on a midquarter report. However, they will not
affect your quarter average. Format will be exactly the same as the homework
assignment: 6 multiple-choice problems (2 minutes and 15 seconds each) and 1
free-response problem (13 minutes). Total time is 26.5 minutes, or 40 minutes
if you have extended time.
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M 4/25/011
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No school.
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T 4/26/011
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HW due: Most students have a weekend off with no additional
HW (except for ongoing group project work, of course). However, students who
missed last Friday’s Mini-AP must take it over the weekend. This is a
required activity, and although it does not count toward your quarter
average, you need to make up the work. Materials will be e-mailed to you by
midday on Saturday, 4/23, and you need to respond by e-mail before class time
today, Tuesday, in order to avoid a score penalty.
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W 4/27/011
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HW due: Work on group project, plus spend
approximately 15 minutes on written AP review. For example, you could do a
free-response problem (13 minutes) and a multiple-choice problem (2 minutes),
or you could do 6 multiple-choice problems (13.5 minutes). Bring your written
work, including corrections, to class. For each problem, jot down the page
number and problem number.
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Th 4/28/011
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HW due: Take the “Half-Back
Test” as a take-home, open-notes test. It is best to try it first without
notes, but then ask friends for help and use your notes to try to do the best
possible job on the test. For this assignment only, collaboration is
permitted without restriction.
Scoring will be based on completeness,
neatness, and accuracy, with up to 4 points in each category. The purpose
of this assignment is to give you some focused AP review along with a boost
to your quarter average. Everyone needs to do the assignment (4 points,
general HW score), but the other 8 points will be treated as pure bonus.
Needless to say, you need a score of 4/4 on completeness in order to receive
any of the other points. Non-serious “space-filler” answers will not qualify
for completeness credit.
If you took the “Half-Back Test” when it was originally offered last week, please
start over with a fresh printout. You may rewrite your older answers if you
wish.
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F 4/29/011
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Target
date for completion of group experiment project (100 pts.). Later dates will be considered on a case-by-case
basis.
HW due (for everyone): Make another stab at the “Half-Back
Test”. If you picked up your submission from yesterday, you can simply
redo the problems that are circled in red. Use a different color of ink so
that it is clear what is new.
In some cases, the only thing wrong was that you forgot to circle your answer
following the formula and plug-ins, or you made a minor notational error. The
responsibility of figuring out what is wrong is yours.
For students who have not yet picked up their papers, a list of incorrect
problems has been e-mailed to you.
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