CS109: Introduction to Probability for Computer Scientists
Winter 2016-2017 |

**Staff Email:**
cs109@cs.stanford.edu

Note: This email address only accepts messages from email addresses
ending in *stanford.edu*. Please make sure to send messages
from your Stanford account, otherwise we won't receive them.

- Midterm regrade requests are open on gradescope through March 1st. Please submit any regrade requests by March 1st. You should make sure to include a write-up in gradescope of why you believe a particular problem was misgraded. We reserve the right to regrade your entire midterm exam to make sure that there are no other grading issues in the case of a regrade request.
- Graded CS109 midterms will be returned through Gradescope on
Wednesday, February 22nd. The statistics on the midterm (out of
120 points) are:
- Median = 91.5 (76%)
- Mean = 87.1 (73%)
- Std. Dev. = 21.39
- Max. = 119.5 (2 people)

- A midterm review session will be help on
Tuesday, February 14th from 3pm-5pm in Cubberley Auditorium.
Slides from the midterm review session are available here.

A version of the midterm review slides with notes is also available here.

- The CS109 Midterm Exam is scheduled for
Thursday, February 16th from 7pm-9pm in Memorial
Auditorium.
The midterm exam is closed book and closed computer/calculator. You are allowed to use three 8.5 inch x 11 inch pages (front and back) of notes in the exam (six sides total). The exam will include a Standard Normal Table, so you don't need to bring one with you. The exam will cover material through class on Friday, February 10th. In other words, the material from Problem Set #4 is fair game for the exam (and we would encourage you to use Problem Set #4 as a source of study problems for the more recent material that may be covered on the exam).

- The CS109 Midterm Exam is scheduled for
Thursday, February 16th from 7pm-9pm in Memorial
Auditorium.
The midterm exam is closed book and closed computer/calculator. You are allowed to use three 8.5 inch x 11 inch pages (front and back) of notes in the exam (six sides total). The exam will include a Standard Normal Table, so you don't need to bring one with you. The exam will cover material through class on Friday, February 10th. In other words, the material from Problem Set #4 is fair game for the exam (and we would encourage you to use Problem Set #4 as a source of study problems for the more recent material that may be covered on the exam).

- The CS109 Midterm Exam is scheduled for
Thursday, February 16th from 7pm-9pm in Memorial
Auditorium.
If you have an unmovable academic conflict with the midterm, please email Mehran by 5pm on Wednesday, February 8th to let him know about the conflict. In your email make sure to include

*all*the times that you would be available to take an alternate midterm exam from February 15th to 17th.

- Solutions to Problem Set #1 were released in class on January 27th. As a result, we are no longer accepting submissions for the first Problem Set.
- Solutions to the Problem Sets in CS109 will only be released in hardcopy. If you do not pick up the solutions in class on the day they are released, you can get them from the handout bins in Gates.
- Mehran's office hours this week are moved to Friday, Jan. 27th from 2-4pm. (They will return to Wednesdays next week.)

- CS109 CA Josh Grinberg has put together a
Combinatorics
Reference Sheet for your future use in CS109.

(This reference sheet is also available from the Handouts page.)

**Information on adding CS109 in Gradescope (including the code you'll need to add CS109) and how to submit your assignments is available here.**

Note: you will need to login with your SUNetID to access that page.- If you are interested in writing-up your problem sets using
the LaTex system (this is optional), there is a short
intoduction to LaTex available as a
PDF document, and you can also obtain the
original LaTex file that was used to generate that
PDF (so you can see an example of LaTex source).
If you would like to write your solutions for the Problem Sets in LaTex, you might find it useful to start with this LaTex template file for Problem sets.

An online LaTeX editor and compiler is available at https://www.overleaf.com/.

- For those of you using LaTex to write your assignments, former CS109 student Joe Delgado has written a nunber of snippets for Latex in Sublime, which he has made available on github. You an find a repo of statistical snippets at: https://github.com/djoeman84/Latex-statistical-snippets and a repo for more general math snippets at: https://github.com/djoeman84/Latex-Math-Snippets.
- Welcome to CS109!
- The first class is Monday, January 9th, 11:30am-12:50pm in Bishop Auditorium.
- CS109 is
**not**videotaped this quarter. If you have a conflict with the class time, we strongly suggest taking the class in a different quarter. - Please watch this web site for important class announcements or assignment errata.
- Handouts from class will be available on the handouts page. Any hardcopies remaining after class will be available in the handout bins on the first floor of the Gates building.
- Staff office hours and locations will be posted on
the Course Staff page.
- The Wall Street Journal published an article entitled New Hiring Formula Values Math Pros talking about how employers are seeking computer scientists with training in statistics and probability. CS109 is specifically mentioned in the article.
- An article from the New York Times discusses the
increasing importance of statistics in computing. The article is
entitled
For Today's Graduate, Just One Word: Statistics.