8,651 reputation
21738
bio website gottwurfelt.wordpress.com
location San Francisco, CA
age 30
visits member for 4 years
seen 15 hours ago

Quantitative analyst and math blogger.


2d
awarded  Yearling
Jul
17
reviewed Approve suggested edit on A strange puzzle having two possible solutions
Jul
16
comment Probability of Random Variable Minus Random Variable
There are quantitative bounds on the approximation such as the Berry-Esseen inequality, but those are almost surely beyond the scope of the course the poster is taking.
Jul
7
awarded  Nice Answer
Jun
18
reviewed Edit suggested edit on Applications of groups, rings and modules in life
Jun
18
revised Applications of groups, rings and modules in life
formatting, capitals
Jun
1
awarded  Necromancer
May
20
answered How to find the sum: $1^{\frac{1}{3}}+2^{\frac{1}{3}}+3^{\frac{1}{3}}+ . . . +(50)^{\frac{1}{3}}$
May
15
comment Probability of getting better than a certain score
Andre, you can always just run a more involved simulation (more trials, or compute some other intermediate results) if you want a coffee break.
May
9
comment How prove this frog can finite steps jump the point $(\frac{1}{5},\frac{1}{17})$
If I understand the problem correctly, a jump like (1/17, 4/17) isn't allowed since it's not of length 1. But you could use (8/17, 15/17) in this context.
Mar
29
answered Two people A and B throwing dice
Mar
22
reviewed Approve suggested edit on derivation of simple linear regression parameters
Mar
19
awarded  combinatorics
Mar
14
comment How likely is it not to be anyone's best friend?
I wonder what, say, Facebook's data on this would look like, where "best friend" would be defined as "person most interacted with on Facebook". Of course this has nothing to do with your model.
Feb
27
reviewed Edit suggested edit on For all sets A, B and C, if $A\setminus(B \cup C) = \emptyset$ ; then $A\setminus C\subseteq B$.
Feb
27
revised For all sets A, B and C, if $A\setminus(B \cup C) = \emptyset$ ; then $A\setminus C\subseteq B$.
improved formatting and changed tags
Feb
18
revised What is my interest rate?
Added new answer
Feb
18
answered What is my interest rate?
Feb
4
comment Expected value of first head in coin toss.
Since $X$ is a discrete random variable, you should take the sum $\sum_x x f_X(x)$, not the integral.
Feb
2
awarded  Nice Answer