On this page you can check all the material for the course, including solutions to assignments and exams

Information from the Student Learning Center

Information about internships for Fall

**12/6: **You can find the solutions to Friday's third test
linked form the "Tests" page.

**12/4:** Apologies for the printing mishap with the third
test. The proper file is on line, in the "Tests" page. Also the Take-Home Exam,
and a sample (with solutions) is also available on that page

**12/2:** Please, take note of the extended hours offered by the Student
Learning Center next week.

**11/25:** The promised additional discussion about the "Body
Temperature" data is now acccessible form the "Additional Materials" page.

**11/18:** The solutions to our third homework are now linked
from the "Homework" page. Also, a short page with examples of testing
proportions has been added to the "Additional Materials" page.

**11/16:** The solutions to our second test are now linked from
the "Tests" page

**11/11:** We will have an in-class test on Monday 11/16. The
material covered will be basic descriptive statistics, and interval estimates.
A sample test, which closely mimics the structure of the actual test, is linked
from the "Tests" page. There will be no "cheatsheet" attached to the test, but
you are urged to prepare your own, recording the relevant formulas needed to
answer the questions. Similarly, you should bring the statistical tables needed
to answer the questions. A (not necessarily scientific) calculator is
recommended, but if you don't have one, you can leave the expressions that
would be fed into the calculator, without evaluating them.

**11/10:** With apologies for the delay, due to a host of
computer problems I had to deal with, the solutions to worksheets 4 and 5 are
posted, linked from the Worksheet link below.

**11/10:** A worksheet applying our new tool, the Student
distribution, to the estimate of the "true" mean (that is, the expectation) of
the samples we first encountered in the first Stats worksheet is on line, with
the solutions. Take note that this tool works fine with the first sample (which
does come from a normal distribution), not so well with the second sample
(which comes from a different distribution), and is awful on the last, which
comes form a distribution that does not have a properly defined expectation, a
situation that we can be faced with when looking at data originating from
distributions with "fat tails", that is, where observations that seem
"impossible", actually are likely to happen (recall the financial crash of
2007/2008 and the Fukushima earthquake, as examples).

11/9: We conclude our overview of
confidence intervals with the introduction of the t distribution. A homework assignment,
covering interval estimates is posted. Please, turn it in by Friday 11/13. We
should also have an in class test on this topic, presumably on Friday.

**Syllabus (PDF)****Syllabus (HTML)****Class Schedule****Preliminary Exam schedule (to be updated as we move on)****How to check your grades using WAMAP**

**11/3:** I have added grades for the first test to the WAMAP
gradebook, for those who were not yet registered when I first posted. I see
that some of you are still not on WAMAP. Please, take the time to register,
following the instructions in the dedicated page. The solutions to today's
worksheet are also on line now (without the formulas used, which are available
in he cheatsheet, and in the "Materials" page on estimating proportions).

**11/1:** Scores for the first in-class test are posted on
WAMAP. Those of you who did not register yet, I could not post your scores.
Please, register now, and I'll update the gradebook ASAP.

- Solutions to the first test are now posted form the "Tests" page
- Today we work on a worksheet covering interval estimates for the mean of two distributions, when the variance is known. Check the solution file in the Worksheets area

**10/22:** A second solution file for the second homework (on
the normal distribution) is linked from the "Homework" page, with a more
detailed description on how to find the answers to the questions

10/21: Solutions to the second homework (on the Normal distribution) are linked from the "Homework" page. Also, a sample first test is linked, with solutions, from the "Tests" page. We will have the actual test, presumably, on Monday 10/26

**10/20:** Tomorrow, Wednesday 10/21, we will work on a
worksheet on descriptive statistics. You can check it out, together with a
separate solution file, in the "Worksheets" page.

**10/19:** An example of a data set and corresponding
computation of indexes is in the Materials page. We will go over it tomorrow,
10/20.

On another note, you might be interested in checking out recommendations posted
to help you handle exams. Look them up at https://northseattle.edu/counseling/academic-help

**10/15:** Two examples of modeling with normal distributions
are posted and linked from the Additional Materials page. We will discuss them,
among others, in class.

**10/14:** Solutions to the worksheet we are currently working
on are now posted on the Worksheet page

**10/12:** Solutions to the homework assignment due today are
now posted. Also, a second assignment, due in a week (10/19) is also available,
as well as the worksheet we are going to work on in class tomorrow.

**10/6:** A file with solutions to the first worksheet is now
available in the Worksheets page

**10/5: ** A first worksheet on probability is available: we
will work on this today (and, possibly tomorrow). Also, a first assignment on
probability is available in the relevant section. Please, turn it in by Monday
10/12. Both are mainly supposed to help us get more into the subject, so do not
hesitate to ask any question that comes up as you work on them.