Flipped assignment 11/3 for Algebra2/Trigonometry This lesson shows you how to find the Binomial probability with the phrase "at least" or "at most" in the question.
Thanks Professor Welton. The book the Intro Course I am taking is "Elementary Statistics A Step by Step Approach" by Allan G.Bluman and the answer key in the back of the book has started a steak of wrong answers for the "at least" problems (you know, >=, that is, inclusive of the "at least" number and above). Just incase I lost my mind, I needed a reality check. But, yeah, its a McGraw Hill Book and they have fallen on hard times. All they could find to write a Statistics book was Bluman and he teaches out a Community College "near" Pittsburgh. They couldn't even find an author from a community College in a city we have ever heard of. Well, obviously Bluman took the money and ran, and McGraw Hill didn't proof the book or publish, or have published a Student Solutions Manual (which is impossible to write if the book has a significant proportion of problems that are so mis-written that they have no solutions, which is also a problem with that book). But, yeah, Professor Welton, maybe you should write an Intro to Statistics Book. How could you do worse, right?
Please don't use marker pen on paper again, it hurts the ear if using earphones but damn great vid man. Also is there a shortcut if they start asking for big numbers?
Is there an easier way to do this if you have bigger numbers. Say there are 20 trials and you're asked for the probability of at least 10 successes. Do I have to go from 0 to 10 and add all of those probabilities up?
Absolutely, you just have to use the formula for Combinations that has the fraction and factorials. Many "lower" level calculators still have the nCr option.
During the wet season, the probability of encountering leeches during a daily bushwalk in the Paluma National Park is 75%. What is the probability that a group of bushwalkers on a 5 day bush walk: (a) will encounter leeches on at least 2 days ? (b) will experience exactly 2 leech free days ?
b is the easier one since it is "exactly" = 5P2 (0.75)^2 (0.25)^3 a. at least is 2,3,4 or 5 = 5P2 (0.75)^2 (0.25)^3 + 5P3 (0.75)^3 (0.25)^2 + 5P4 (0.75)^4 (0.25)^1 + 5P5 (0.75)^5 (0.25)^0
For that last one, you said "click the link to see if you got it right." What link????? I got .0041152263. Can someone let me know if that's correct? Or where to go see if it's correct? Thanx in advance!! Great video BTW!!!
sitting for half an hour just staring at my textbook...and this video solved everything in five minutes. thank you!!!
Same
Most interesting to say the Least.
Thank you for the straightforward explanation. Extremely helpful. Thanks.
Thanks Professor Welton. The book the Intro Course I am taking is "Elementary Statistics A Step by Step Approach" by Allan G.Bluman and the answer key in the back of the book has started a steak of wrong answers for the "at least" problems (you know, >=, that is, inclusive of the "at least" number and above). Just incase I lost my mind, I needed a reality check. But, yeah, its a McGraw Hill Book and they have fallen on hard times. All they could find to write a Statistics book was Bluman and he teaches out a Community College "near" Pittsburgh. They couldn't even find an author from a community College in a city we have ever heard of. Well, obviously Bluman took the money and ran, and McGraw Hill didn't proof the book or publish, or have published a Student Solutions Manual (which is impossible to write if the book has a significant proportion of problems that are so mis-written that they have no solutions, which is also a problem with that book). But, yeah, Professor Welton, maybe you should write an Intro to Statistics Book. How could you do worse, right?
You're better than my professor. Thank you infinitely!!
thanks!! you really made it easy to understand the process and solve the problems
Wow so amazing ,am so grateful because of this video i understand better than my lecturer
Please don't use marker pen on paper again, it hurts the ear if using earphones but damn great vid man. Also is there a shortcut if they start asking for big numbers?
Best vedio ever
thank you so much!
Is there an easier way to do this if you have bigger numbers. Say there are 20 trials and you're asked for the probability of at least 10 successes. Do I have to go from 0 to 10 and add all of those probabilities up?
Thank you
If you changed the first question to “at most”, wouldn’t it give you the same results as the “at least”?
thank you bro save my time...
what a teacher! incredible!
um the at most seems a bit confusing but,i got the at least down
thankyou
Thaaaaaaaaank youuuuu I was killing myself about 12c4
But what if the "at least" numbers are bigger? Like "At least 7 out of 20?" Is there a new formula to use then?
fucken love you man
can you do this without that type of scientific calculator?
Absolutely, you just have to use the formula for Combinations that has the fraction and factorials. Many "lower" level calculators still have the nCr option.
How about the "by hand" version, versus "by calculator" version?
THANK YOU
Can u do something similar to how when it at least 1, you do 1-p(none) ?
Thanks dude
That was vey helpful. Thanks a lot! :)
Where’s the link for the 1st one
so If i needed to find a least three things from 20 do \i have to do that 18 times?
Where's the link?
thank you so much for this video!!!!
great
how do you not get high from all that sharpie odor
where is the answer?
0.209
During the wet season, the probability of encountering leeches during a daily bushwalk in the Paluma National Park is 75%.
What is the probability that a group of bushwalkers on a 5 day bush walk:
(a) will encounter leeches on at least 2 days ?
(b) will experience exactly 2 leech free days ?
b is the easier one since it is "exactly" = 5P2 (0.75)^2 (0.25)^3
a. at least is 2,3,4 or 5 = 5P2 (0.75)^2 (0.25)^3 + 5P3 (0.75)^3 (0.25)^2 + 5P4 (0.75)^4 (0.25)^1 + 5P5 (0.75)^5 (0.25)^0
what's the answer I don't see a link! I got .2099
Thank you!!!! :D
Lit
good video
watched!
For that last one, you said "click the link to see if you got it right." What link????? I got .0041152263. Can someone let me know if that's correct? Or where to go see if it's correct? Thanx in advance!! Great video BTW!!!
Nevermind, that's not right! I got .2098765432. SOO sorry! How bout that, is that correct? Thanks again guys, sorry
"point 60"?
..
he changed the probability from % to a decimal
hi weltonator lol