/sci/ - Science & Math

>trying to explain montey hall problem to family
>they insist im wrong for like 2 hours.
>write it down on paper and show them
>"your crazy thats not right"

>>3109130
I know that feel bro...

>Teach university level physics lab
>Tell them "This is the answer to a written problem in the report."
>Give answer
>No one gets it right

I fucking hate undergraduate students. They make me depressed. I may have to follow a CS professor I had in undergrads advice and get smashed before grading. Then the stupid is just funny and not depressing.

>>3109146
>implying you can grade accurately whilst smashed.

>>3109146

Sir? Is that you? The board of management won't be too impressed with your teaching ethic when I tell them of this.

>>3109161
prove it's me, faggot.
just for that, i'm going to randomly fail one student for no reason. i'll pick them at random like roulette, and fuck they're life up, and it'l be all thanks to you.

>>3109167

Oh, sir, I know exactly who you are.

>>3109167
>they're life

>>3109157
It is since there isn't really a "you got this sort of right so you get partial credit." It is either right or it is wrong.

>>3109161
Psh...like anyone calls me "sir." And besides, getting frustrated at the students lack of caring does not mean I do not try. There is normally at least one or two people in the class that seem to actually care. I try for them and them alone.

>>3109173
you cant prove it, they will never know what i've done.

>>3109176

>>3109130
The montey hall problem is easiest to illustrate when using 100 doors. If they still didn't get it ... well then

>>3109186

>>3109190

I was unaware of this problem and already the answer is obvious to me: the chances are simply higher that you picked a goat first.
Now that you know where one goat is, and the higher chance that you already picked a goat when it was balanced, there is higher odds in switching.

>>3109130
do a physical example using 10 cups and 1 ball
have them place the ball and play the role of game show host (revealing 8 empty cups or "goats"), and choose as the solution to the Monty Hall problem dictates

you should get in right 90% of the time
see if they can explain that shit

>>3109186
It's not exactly intuitive for most people
>Many people refuse to believe that switching is beneficial. After the Monty Hall problem appeared in Parade, approximately 10,000 readers, including nearly 1,000 with PhDs, wrote to the magazine claiming that switching was wrong. (Tierney 1991) Even when given explanations, simulations, and formal mathematical proofs, many people still do not accept that switching is the best strategy.
http://en.wikipedia.org/wiki/Monty_Hall_problem

>>3109224
So the monty hall problem essentially states 2/3 of the times its beneficial to change ones decision in a game show situation?

>>3109253
yes.

>>3109257
How's that hard to grasp?


Are people really that stupid.

>>3109266
Yes they are.

Note however that this only applies when the host opens the other doors and can't pick the car.

In a game like "Deal or No Deal", the player opens the other 'doors' and switching at the end would have no effect.

>>3109266
>Are people really that stupid.
suprised?
2 words:
Harold
Camping

>>3109224
In an unrelated survey of writers of letters to the editor of magazines, it was found that approximately 10% of high-school drop-outs claimed to have PhDs.

>>3109257
no

>>3109286
what, yeh it is? did you not follow the picture?
no witch = random choice is 1/3 chance to pick the car and win
switching = 2/3 chance to switch to the car, and win.
switching is beneficial the majority of the time, so it is the rational choice if you are offered a switch.

The problem with the monty hall problem is, yes, statistically you get it right 2/3 of the time, but when you set it as a standard, and you want to pick the fucking car, and you point at the car the first time, you won't get the car. And that sucks.
I fucking hate statistics. It doesn't exist.

>>3109186
>The montey hall problem is easiest to illustrate when using 100 doors.

You choose one of the hundred doors, but before opening it Monty Hall opens another door revealing a car: what is the probability that the goat behind one of the other 98 doors is better than the goat you've got now?

>>3109176
>Stopped reading there
>Read about 90% of it
>lrn2notread

Monty Hall only opens a door and shows you a goat if you picked the car.

He wouldn't fuck with you like that unless he wanted the car for himself.

>>3109303
he doesn't mean he actually stopped reading, he just means that is the point in which he figured out the poster was retarded (or trolling, as the case was)

>>3109320
THANKS

>>3109315
But he's stalling for time. He knows most people won't switch, so he's switching the car with the other goat while you make up your mind.

>>3109329
Little do you know, he has poisoned both goats with iocaine powder.

>>3109320
>Posting picture clearly saying 'Stopped reading there'
>Have to derive authorial intent of picture
/lit/ is that way...

>>3109146
you sound like a misanthropic nerd. I'm a physics undergrad. I know teachers that have your attitude... and they aren't shit to me. Every time one of them comes to me with their shit attitude I put them in their place. If you ever wanna start shit with me go ahead. I'll break your fucking thumbs you little bitch :) have a nice day

>>3109391

>>3109397
>showing a picture of what he cannot have

why torture yourself?

>>3109266
Because, to some, it seems to make more sense if the probability that your door has a car behind it is 50%.

>>3109320
(S)he shouldn't have used an inapplicable image then.

My image is mister burns, but it's a metaphor for you're dumb. I promise.

>>3109391
Do you really expect us to believe that you have previously broken the thumbs of your teachers and not been expelled from college?

>>3109431
well duh

>>3109416
well i agree, but w/e.
how is that a metaphor?

ITT: People who just won't admit they too you should stick rather than swap.

>Taking general physics class
>Teacher tells us exactly which kinds of problems will be on the test and does examples of each
>Test problems are the exact same as the one's he worked on the board with the numbers changes and other small changes
>Get perfect 100 on every test and final
>Class average on every test and final is ~65

>Check that teacher's rate my professor
>Every review says the class is impossible
>Seriously, wtf

You literally could get a perfect score in this class by just showing up to class everyday and studying only for about an hour before the test, but most people couldn't even do that.

>>3109096
Sociology is not science. It tells you someone who is studying at a social science faculty, degree in journalism.
Anyway, is my first year and i had party enough, so in september i will begin enggeniering, it´s not pure science, but is smth.

>>3109524

I'm an actual Psychology scientist, not like my fellow undergrads who want to be clinical psychologists. For med school students, you have no choice but to go on to get your MD. I do more real science in my field than many "hard" science majors do. Most of hard science is math and theory. In psych, we do experiments and collect data.

>>3109512
>got into university of choice (Canadafag)
>pretty much gave up on all courses
>study the night before and in the morning
>get 100 on physics quiz whose questions the teacher has addressed in class repeatedly
>"man how did you do that?"