Statistics 101: Binomially Distributed Mac OS X User Rate

[@Surya42930]

Best youtube lecturer ever seen......Simply amazing !!!

[@rickjesse8442]

Is there an error with the value of P(0) at 25:14? I get 0.0079867 and Excel's BINOM.DIST gives that same value with arguments as 1 - BINOM.DIST(5, 25, 0.073, true)

[@nicolachavez]

i got the same as yours.

[@piti69]

@@nicolachavez The problem is that he didn't use 5, he used 7

[@estelle159]

i have the same questions

[@Surya42930]

Will hang in to learn all your videos Brandon....Your words at the beginning of every video talks about your true personality to help others in the way you can !!! Kindly keep uploading more videos..We are really gaining useful insights...Cheers Brandon. God Bless You :-)

[@BrandonFoltz]

You are so very kind. :) Thank you. But the true heroes are those who want to learn and commit to it. Hang in there! - B

[@Surya42930]

Hi Brandon...how are you ? These days cannot see any new videos on Statistics...are you alright with health or are you simply busy with few other priorities...for people like me on the other part of the world, you are a GURU and with your insight being shared helps us to climb up the career..kindly do reply Brandon...Thank you

[@BrandonFoltz]

Hi Surya! I released on last week. But yes, my regular job takes up a lot of time, so I only have evening and weekend to work on my videos. They will keep coming, just slower. AND the topics are more complicated so they take longer as well, to do them properly.

[@kinjalvora3352]

It is 0.007987 binomcdf and not 0.00028

[@islamabbas5718]

Thanks for this video, please could I ask what is the general formula for the cumulative binomial distribution ?

[@dariab.9140]

Hello Brando. Why we are interested in +-3 stdev? In previous videos you were talking about +-1 stdev only.

[@romanvasiura6705]

Thank you for this nice lesson. Step by step I started understand more about this interesting things. I like it 🤠

[@chejado]

Just wanted to say thank you for all of these videos!!

[@prabhudaskamath1353]

You are a rare gem!! Thank you Brandon,,

[@shubhamlasure5441]

Hello sir! Scientific calculator are not allowed in our university. Can you please show us calculations on paper which you are doing in calculator?

[@islamabbas5718]

Please could I ask who and how to determine the success percent in the binomial distribution? Like in this example how the .073 is calculated. Thank you so much.

[@meagain919]

Hi, I really appreciate your lovely work. U are my mentor, indeed. But one thing here is bothering me and I don´t know if something is wrong but I really tried this from out any angle - - - When we are going to find out "# How Many from 5 and up to 25 users and the probability - I constantly get the number to be 0.007987 and I did set the lower value from 6 and upper value to 25. I hope one day you could explain how you got to your number to be 0.00028. / Love

[@chejado]

Same here.

[@TimvanWessel]

i even downloaded a Ti 83 emulator and it also comes with this answer same as my excel. The rest was OK so this is a error in the video?

[@annominous9567]

Yes, it is. I get the exact same answer as everyone else. I ran it three or four times just to make sure. The correct answer for the probability of more than 5 users is indeed .007987, or, rounded, .00799. You'll get the same results using either your TI, or, as Wilken did it, summing up the values in Excel. It's confusing (and kind of interesting), because the error is repeated consistently throughout the video.

[@cuivienor]

Brandon likely mistyped on his calculator, because 0.00028 is the probability that 8 or more users are using MacOS X. So he may have mistyped and did 1-binomcdf(25,0.073,7). It's easy to see that this answer is wrong because the bar at 6 in and of itself seems higher than 0.00028.

[@islamabbas5718]

Same happen with me

[@romanvasiura6705]

We should mention for answer Q4 probability more than 5 users are using MAC OS X ... according to Excel will be 0,8%

[@tusharsoni10]

Hello Brandon, I really like the content and the methods you use to explain stuff. I had one query. While doing a manual calculation vs. using direct formula in excel, i found some difference in my result. In this example, where n=25, p=0.073 and q=0.927, while using direct formula in excel for the 3rd iteration(i.e. no. of successes = 2) , i get a value of 0.28. However, for the same point when i use the manual calculation(i.e. C(n,x)*p^x*q^(n-x) I get a value of 0.30. And the same occurs for all the values after the second iteration. Any explanation would be helpful.

[@thingocduytran7430]

I like this video, thank you so much.

[@nikhiljain4828]

Hi Brandon Recently i have started to watch your videos and found them amazing. The way you takes the tour from basic concepts to examples is perfect. Thanks for such an amazing work. In your last video you told that standard deviation is n*p*q for logistic distribution. Can you somehow show how it is related to (x-u)Pow2 *P(x). I tried doing it but could not.

[@PnarSAGLIK]

Greetings from METU =)

[@sumitbose7873]

Excellet work...