|Off on a Tangent
|A Fortnightly Electronic
Newsletter from the Hope College Department of Mathematics
Predicting farm incomes in Uganda
incomes in Uganda---Linear, Logistic, LASSO, and beyond
|Speaker: Dr. Yew Ming Koh, Hope College
|Time: Tuesday, April 17 at
|Place: VanderWerf 102
Abstract: A study on farming practices
and farm characteristics was carried out in three sub-counties of
Kibaale District in Uganda. Using techniques from Statistical Learning,
we identify salient features of these farms which are most useful for
predicting farm incomes. We discuss the various models used, methods
for comparing their prediction accuracy and interpretability, and
conclude with a list of levels of features which lead to the highest
predicted likelihood of high farm incomes.
Analyzing ranking data
|Speaker: Dr. Martha Precup,
|Time: Thursday, April 26 at
|Place: VanderWerf 102
Abstract: Suppose you are given data in
which consumers were asked to pick their two favorite restaurants from
a list of 5. How can you analyze this information? In this
talk, we will use linear algebra to discern the effects of any one
choice on the overall results. Our methods will use important
tools from representation theory called Young tableaux and can be
applied to any kind of partial ranking data.
|Students participate in the Lower Michigan Mathematics
students (Front row: Jarrod Devette, Emily Marino, Kimberly
Breyfogle. Back row: Calvin Gentry, Leah Krudy, Richie
Frost, Dane Linsky) traveled to Hillsdale College on Saturday, April 7
to compete in the Lower Michigan Mathematics Competition along with
many other teams from a number of other Michigan colleges and
universities. They reportedly had a good time and the trip
involved donuts, ice cream, show tunes, as well as a little mathematics.
results should be announced later this month. To view the problems the
students worked on click here.
Solvers of the Fortnight
our last problem of the fortnight we had the following:
decorate my scrapbook, I cut a 4-inch wide parallelogram out of a
square piece of paper as shown in the diagram on the left.
Surprisingly enough, the parallelogram and each of the two leftover
pieces of paper all had exactly the same area! What are the exact
dimensions of the original square?
Congratulations to the following who correctly determined the correct
dimensions: Samuel Allbritten, Anna Carlson, Carolyn Cooper, Jordan
Corstange, Adair Cutler, Christian Forester, Brandon Fuller, Ce Gao,
Calvin Gentry, Hunter Giewswin, Mason Humphrey, Elizabeth Inthisane,
Philip LaPorte, Kachikwu Nwike, Zheng Qu, Madeline Stanton, Caleb
Stuckey, Fangtao Wang, and Yizhe Zhang
the graph of y =
the first quadrant shown in the figure. What is the constant k so
that the areas of the two shaded regions are equal when sliced by the
line y = k?
your solution (showing all relevant work) and drop
it in the Problem of the Fortnight slot outside
Professor Mark Pearson's office (VWF 212) by 3:00 p.m. on Friday, April
20. As always, be sure to include your name and the
name(s) of your math professor(s) -- e.g. Nadia
--- on your solution.
Little darling, it's been a long cold lonely winter
Little darling, it feels like years since it's been here
Here comes the sun
Here comes the sun, and I say
It's all right
(Okay, this is just