Editor Anirban DasGupta writes: Well done to Promit Ghosal (pictured below), at Columbia University, who sent a careful answer to this problem. Promit Ghosal The problem asked was the following. Take an integrable function $f$ on the unit interval, and for $x$ in the interval $[j/2^n, (j+1)/2^n)$, define $f_n(x)$ to…

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Bulletin Editor Anirban DasGupta sets this problem. Student members of the IMS are invited to submit solutions (to bulletin@imstat.org with subject “Student Puzzle Corner”). The deadline is now September 8, 2016.   It is the turn of a problem on probability this time. We will consider a problem that looks…

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Puzzle 14 Bulletin Editor Anirban DasGupta sets this problem. Student members of the IMS are invited to submit solutions (to bulletin@imstat.org with subject “Student Puzzle Corner”). The deadline is June 7, 2016. It is the turn of a statistics problem this time, and we are going to look at a…

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Bulletin Editor Anirban DasGupta sets this problem. Student members of the IMS are invited to submit solutions (to bulletin@imstat.org with subject “Student Puzzle Corner”). The deadline is now April 15, 2016. — We consider a problem on Gaussian extreme values. It comes across as a difficult calculation, but when looked…

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Editor Anirban DasGupta writes: Well done to Lu Mao (pictured below), of the department of biostatistics at the University of North Carolina at Chapel Hill, who sent a carefully written solution. Lu Mao The problem was to find a minimax estimator of $m = |µ|$ under squared error loss when…

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