Home
Creators
Search Recent Missing Random
Posts
Search DMs Popular Hash Lookup Tags Random
Importer
Import FAQ
Register Favorites Keys Review DMs Logout
Community
Telegram ThePornDude
Home Creators Posts Import Register Favorites Logout

Exam Hack | CIE A2 Maths | S2 | Poisson Distribution Question (Patreon)

Published:
2022-09-20 02:56:33
Imported:
2026-06
Tags:
haven't archived this post yet. have a subscription? use the importer!

Videos

Downloads

  • Poisson Distribution - WORKSHEET.pdf

Missing 1 full-res photo, 1 file, as this post has not yet been imported.

Content

Exam Hack - S1 - Binomial Distribution: https://youtu.be/dx2AHaUvt4U

Exam Hack - S1 - Normal Distribution - 2: https://youtu.be/mX8IU4hofvg

Proof that Binomial tends to Poisson: https://youtu.be/ceOwlHnVCqo

Normal Approximation to the Poisson: https://youtu.be/CCqWkJ_pqNU

Files

Previews only

(No title)

Comments

Intuitive
>>100202391

Tamil? I’ve spent time in Chennai, and this doesn’t sound like you’re saying something nice…

Isfar Ahamed
>>100202391

Hey, it’s nothing wrong, just a common slang here. If offended sorry. I love ur content.😄

Eirene Chiam

Hi, thanks for all the great content 😊, quick question, when it switches from poison to normal and we have to +/- 0.5 to the µ, how do we know when to -0.5 and when to +0.5?

Eirene Chiam

Also, having some problems with poison to normal distributionq2ii) in the worksheet as i got a negative z value and I calculated the 1- -ve z value to get the probability but when I checked the answer at the back it’s just the +ve version of the z value?

Intuitive
>>102461161

When would you get a mean of +/-? I can't see how that would be possible. I guess if you did you'd plug in the '+' value and the '-' value getting two different solutions when plugging it into your Poisson Density function.

Eirene Chiam
>>102461161

in question 4), it switches from poisson distribution to normal distribution, so in this questions the normal distribution is X~N(31, 31) since X~Po(31), and they are asking me to work out P(X>40), typically when I've seen '>' signs, I usually -0.5 from the X value (40 in this case) to plug into the equation- so i got (39.5 - 31)/square root 31, however when I checked the ms, they used 40.5 (+0.5) instead of 39.5 (-0.5) which is the value I was typically told to use and had worked for me in past questions. So now I'm unsure as to when I should be minus-ing or plus-ing the 0.5 error.

Intuitive
>>102461161

Oh you're talking about continuity correction. You're plussing 0.5 for that case because > 40 needs to exclude 40 to be as accurate as possible, so you use > 40.5 not > 39.5, as 39.5 would include 40. Basically, if you're confused about this look up continuity corrections for the normal distribution approximation. I talk about it as well in my "S1 Normal Distribution - part 2" on YouTube.

Intuitive
>>102461450

Maybe you should recap the S1 Normal distribution content on my Youtube. This is just to do with the symmetry of the distribution. Also watch the videos I link in the description box bellow the video.

Samhitha Ahoratra

hey, around 31:28, wasn't z already less than -0.982, so when subtracting you switched the sign, and then switched it again. I don't understand why you switched the sign the first time.

Samhitha Ahoratra

Hi, don't know why in Q15 s2019_61, they used 115 as mean and standard deviation, also if i were to use 2.3, i get the z value as 71.3, which i don't think i can find on the z distribution graph. so what would i do in that case. Please try and help soon, I have my exam on Monday lol

Lyndon Dias

hey, Jacob, in the 23rd [a] question, you made a mistake, the answer is 0.144

Tapiwa

When can we get the other s2 topics

Ryan

Please can you do a Hypothesis testing video.