Announcements
- Feb 13. The D2L Midterm is open. Take it like you would take a Practice Quiz, with these
differences: (1) only one attempt is allowed, (2) the time limit is 2 hours, (3)
your score will not be posted until after the D2L Midterm
closes on Monday, Feb 16, 11:59 PM.
- Feb 11. The
Takehome Midterm
is open. It closes at 11:59pm on Tuesday, Feb 17.
Submit it in the Takehome Midterm dropbox.
- Feb 10. Items to include in project submissions. For each question,
if you used R to answer the question, include all R source code statements,
all R output and/or graphs that were produced, and typed answers to questions
if requested. If you did not use R for a question, but calculated an answer by
hand, show all of your work. Don't just show the answer.
- Feb 5. Project 3 has been split into two parts: Project 3ab is due on Feb
19; Project 3c is due on Feb 24. Part b is also revised: add the regression line
to the scatterplot of y vs. x, add the horizontal zero line to the residual
plot, and add the normal line to the normal plot. See the Laundry Detergent and
2024 Bears problems in the
Linear Regression section of the Feb 4 Notes.
- Feb 2. You may wish to try this suggestion for your Project 3B dataset: let
x (independent variable) be the number of bites taken from a Twizzler candy
stick; let y (dependent variable) be the length of the Twizzler after taking the
bites. Record x and y after each bite. It is easiest to measure the length
in centimeters. Record data from more than one Twizzler. If you
don't want to eat that much candy, spit the bites out before swallowing them.
- Jan 30. Practice Quiz 3 closes Sunday night. Please complete your three attempts by then.
- Jan 27. Signup for the proctored final exam is posted.
Find the signup on the right side of the D2L home page for IT 223.
- Jan 27. In case you are wondering how my trip to Nebraska
is turning out, my mother passed away last Thursday; the funeral
will be held this coming Thursday. I am more relieved than sad
because she was not doing well. I fly back home on Saturday.
- Jan 26. Project 2a will not be counted late if submitted by
Saturday, Jan 31.
- Jan 22. Problem 5 of Project 2a asks you to plot three different
histograms of the dataset, one with the default bin boundaries and
two histograms where you set the bin boundaries (break points) explicitly.
In the discussion of Project 2a at the end of the Jan 21 Notes, an example
has been added that shows how to specify break points, one using the
c function and one using the seq function.
- Jan 21. As I told the class today, I will be flying to
Nebraska tomorrow to see my mother who is in hospice care.
There should be no problem with classes on Monday and Wednesday;
I will be zooming in from there. Scheduling office hours might
be more hectic; just email or text me as usual if you have
questions or would like to schedule an appointment.
- Jan 21. The last question of Project 1a says: "Plot your dataset by observation number.
Describe this plot using
the terms unbiased, biased, homoschedastic, and heteroscedastic." It also asks you to discuss any
lurking variables in your dataset if you can think of some." This question will
be moved to
Project 2bcd.
- Jan 21. The questions and answers are posted for Practice Quiz 1.
- Jan 18. Reminder: there is no IT 223 class tomorrow because it is Martin Luther King day.
See you Wednesday, Jan 19.
- Jan 15. Two reminders:
- Project 1 is due today.
- Practice Quiz 1 is due on Sunday, Jan 18. Because there was a typo
for Question 5, everyone will receive credit for that question. The typo
is fixed in case you have any remaining attempts. (You are allowed three
attempts for each practice quiz.) Quizzes cannot be taken late.
- Jan 10. Each quarter, the DePaul asks instructors to submit a list of
no-shows for their courses. If you have synchronously attended at least one of
the IT 223 class meetings, or
submitted a study log for Week 1, you will not be reported as a no-show. However, if you have
not attended any class meetings and have not submitted a study log for Week 1, please submit
a document to this Attendance Verification drop box, stating that you wish to remain in the
class. Please submit this document by noon, Tuesday, Jan 13.
- Jan 5. The Zoom recording of the lecture for Monday, Jan 5, is posted.
Find it on D2L at
Content >> Zoom
Invites and Recordings.
- Jan 5. A dropbox is posted on D2L for submitting your study logs. Recall
that you need not submit a study log for a week if you attend both class meetings
that week synchronously
via Zoom.
- Jan 5. The first meeting of the IT 223 class for Winter, is on Jan 5, at
11:50 am to 1:20 pm on Zoom.
- Jan 5. Scheduled office hours, via Phone or Zoom, on are Tuesday evenings
from 7 pm to 7:45 pm and Wednesday afternoons from 4 pm to 4:45pm. If you cannot
attend office hours at these times, contact me to set up an alternative meeting
time.
- Jan 5. All course materials will be posted on this website. D2L will only be used for
(1) submitting projects,
(2) posting course scores and comments, and (3) practice quizzes.
- Jan 5. Practice quizzes count 10% of your course score. You can take each
practice quiz up to 3 times. The highest score that you obtain will be used for
your quiz score. A practice quiz will be posted on each Friday except midterm
week. This quiz will be due 8 days later on Sunday night at 11:59 pm.
- Jan 5. The first quiz, Practice Quiz 1, will open by Friday, Jan . This quiz
will be due on Sunday night, Jan 19.
- Jan 5. Attendance counts 10% of your grade. Students obtain credit for
attendance by attending Zoom class sessions. If you must miss a class,
obtain credit for attendance by submitting a study log for that week, which will
summarize what you did to study for IT 223 during that week. Although exactly what you submit is up to
you, here are some suggestions: the number of hours you spent studying for the various
parts of the class (e.g., watching lectures and studying class examples, working on
tutorials, projects, and practice quizzes), what did you find interesting, hard, or
confusing, what questions did you have? If you have questions for the instructor,
email him directly, in addition to putting these questions in the study log.
Study logs are due Tuesday, for the preceding week. They
are subject to late penalties. Study logs should be about one third to one half of a page in length.
- Jan 5. The official late penalty is 10% per day that a project is late. Projects will
have a three day grade period before they are counted late. If you have
extenuating circumstances, late penalties may be reduced if you talk to the
professor, either by phone or via Zoom. Although it is possible for the late
penalties to be reduced, they cannot be totally eliminated.
- Jan 5. The last day to drop this class with full tuition refund is
Friday, Jan 16.
