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  1. Hi, I am writing to ask if someone could help me with a big doubt I have. I want to do a degree satisfaction statistic study for which I had created a survey. The problem is that I want to know how could I use the questions I added and what I can study from their result, such as the mean, the average, etc. The type of questions I added are the following: 1. The experience in whatever has been rewarding ...? a) Completely rewarding b) Rewarding c) Not rewarding at all d) Completely not rewarding 2. How would you rate your experience in whatever...? From 1-10 a) 1 b) 2 c) 3 ... 3. Did you
  2. i see similar questions come up quite often: The random variable X follows a poisson distribution. Given that P(X<=1) = 0.2, find the mean of the distribution. <= is less than or equal to. so i try to rearrange and i get to : e^-m (1+m) = 0.2 I dont know what to do next, anyone know ? Thanks! -GOD
  3. Hello! This is my first post here. So I am planning on doing an extended essay in mathematics. I was originally planning on researching the Fibonacci sequence, but I've gotten a bit less interested in that and more interested in the golden ratio(phi) which can be derived from that sequence. I believe this would fit under the idea of "the beauty of mathematics" as written in the IB extended essay handbook for math. I'm just having a little bit of trouble deciding exactly what I should focus on in my extended essay (and what would be to broad or too narrow). Right now my idea is to write it on
  4. Hi guys! I am soon going to get my assignment for HL math IA type II - mathematical modelling. I've been looking at some of the previous portfolio titles, and found myself quite confused as to what is this IA all about. They seem to require you to make up parameters and identify variables and stuff. Besides, I don't seem to quite understand what does the IBO mean by a "mathematical model". Is it an equation? Is it a couple of equations? Just what is it? Basically the question that I am asking here, is what is this type II IA all about, what is expected of me and what the hell is a "mathematica
  5. Hi I have values like 4 grams, 3g,4g,9g,10g I measured this using kitchen scale. It does not say any uncertainty on the scale 1) So should I include uncertainty in the lab report (+- 1g)??? 2) If you are say do the uncertainty, then I have to calculate the mean for these numbers. What do I do? Do I have to first change uncertainties into percent uncertainties, then add them, then turn them back into absolute uncertainties for the final value??? My kitchen scale rounds rumber to nearest whole number
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