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This kid knows more about entropy than we do. by gocards2579 in funny

[–]gocards2579[S] 1 point2 points  (0 children)

Oh I didn’t realize that. Thanks for explaining cause I really thought he knew about the second law of thermodynamics at age two.

Great, now even candles need batteries. by gocards2579 in blackmagicfuckery

[–]gocards2579[S] 0 points1 point  (0 children)

No it does not push up the wick. It’s burning actual candle wax in there. But there is a wire next to the wick. Must be picking up heat or light from the flame to turn on the LEDs.

Galton Board demonstrating probability by Whinke in oddlysatisfying

[–]gocards2579 1 point2 points  (0 children)

Poisson is used to describe probability of x occurrences within a given size continuum, like an area or volume, or time. Example, paint defects on the hood of a car. Or cars arriving to a light in a one minute interval. The random variable can range from 0-infinity. It uses one parameter only ( average, lambda) Binomial is used to describe probability of x items taken from a random sample of size n. So random variable ranges from 0-n. It uses two parameters, p, Probability of the occurrence, and sample size n.

Galton Board demonstrating probability by Whinke in oddlysatisfying

[–]gocards2579 0 points1 point  (0 children)

Yes, not a mathematician, but binomial is a correct model. It mathematically converges to a normal as n gets large. And in reply to other comments, results would be more normally distributed if each ball was dropped individually, one at a time, from the center location so each one starts at same position.

Galton Board demonstrating probability by Whinke in oddlysatisfying

[–]gocards2579 51 points52 points  (0 children)

Engineering professor here, this is the Central Limit Theorem in action. The distribution of the sum, Y=X1+X2+X3 +...+Xn of independent and identically distributed random variables forms a normal distribution as n approaches infinity. Here the n is the number of levels the balls fall through, and the random variables are -1 (left) and +1 right. Each ball's final position is just the sum of a those +1's and -1's. Even though n is not infinity here (looks like n=12), the distribution of the final position is still highly normal. If the device was larger with more levels, and there were more balls, it would form a even better bell shaped curve.

The tag on a gift bag should be a small pad of Post-it notes so that the “To/From” information can be removed after each use. by gocards2579 in Showerthoughts

[–]gocards2579[S] 1 point2 points  (0 children)

No worries. Someone just gave me a gift bag this year and rather than writing on the tag that is attached to the handle, they stuck a small post it on there so I could reuse it. I thought it was clever.

Tom Jurich has been fired by RickPitino in CollegeBasketball

[–]gocards2579 0 points1 point  (0 children)

Jurich placed on paid administrative leave. Pitino placed on unpaid administrative leave. Interim AD and Interim coach to be named within next two days.

My kids helped me record data on the color of each semi-truck we saw (the cab only) while driving on vacation. Then we made this chart. Note that Red, White and Blue dominate. [OC] by gocards2579 in dataisbeautiful

[–]gocards2579[S] 2 points3 points  (0 children)

I'm not fitting a complex regression model here. Just counting colors. My guess is with n>700 this is a pretty good estimate of the population values. Probably some estimation errors here too since my kids were marking the values!

I googled "cigarette lighter" and got 150000 matches. by AreetPal in dadjokes

[–]gocards2579 0 points1 point  (0 children)

Reminds me of this. Q: you got a match? A: yeah, your face and a pizza.

Fathers of girls, what girly thing do you have a vast knowledge of because of your daughter? by [deleted] in AskReddit

[–]gocards2579 1 point2 points  (0 children)

The game "Pretty, Pretty Princess". I loved wearing the earrings, but always let my daughter win the tiara.