Student Puzzle Corner
In this issue, we look at the consequences of having only incomplete data. For example, suppose a random variable $X$ has a normal distribution with mean $\mu $ and variance $\sigma ^2$, and both parameters need to be estimated. With usual data, which we call complete data, namely iid copies…
Bulletin Editor Anirban DasGupta writes:
Well done to Yixin Wang of Columbia University, who sent correct answers to all three parts (although fuller answers are encouraged).
The problem asked was to characterize the set of recurrence points of three $d$-dimensional random walks with step distributions $F$:
(a) $d = 1,…
The Student Puzzle printed in the April/May IMS Bulletin is clearly proving difficult to crack. So, to encourage more entries, the deadline has now been extended until June 18, 2015. Good luck…!…
The Student Puzzle Corner contains one or two problems in statistics or probability. Sometimes, solving the problems may require a literature search. Current student members of the IMS are invited to submit solutions electronically (to bulletin@imstat.org with subject “Student Puzzle Corner”).
The deadline has now been extended to June 18,…
Anirban DasGupta writes:
Well done to Yixin Wang (Columbia University) and Vivian Meng (McGill University), who provided correct solutions to the various parts of the problem.
Yixin Wang
Vivian Meng
The problem asked was the following: suppose $X_1, X_2, \cdots , X_n$ are iid $N(\mu , \sigma ^2)$ where the…