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  1. Alchemist4lyf

    Maths, Addmaths and Statistics: Post your doubts here!

    Re: O'level Maths, Addmaths and Statistics help available he Correction = In section B, you do any 4 out of the 5 questions (7,8,9,10,11).
  2. Alchemist4lyf

    stats question

    Standardised Death Rates take age standard populations into consideration as well. Crude Death rates take only age population. Thing is, Crude Death rate gives you, like, a summary type picture. Standardised death rates, give you like, the whole package. The whole picture. In it, the picture of...
  3. Alchemist4lyf

    Independent Events

    As in, for example, i got two events, A and B, and their probabilities. And i got P( A or B). Now they say, is this mutually exclusive or not? I know how to do that, as P(a) + p(b) should equal 1. But how will i know, if the events are independent, or dependent?
  4. Alchemist4lyf

    Independent Events

    Thanks abcde. But i knew that one too. I was thinking more along the lines of something that would allow me to prove independence or dependence. Can you help with that?
  5. Alchemist4lyf

    Independent Events

    Salam. I wanted to ask, is there any other way or equation to show independence? Like, there's one where p(a and b) = p(a) x p(b). But is there any other one. And for dependent events as well. Is there any other equation?
  6. Alchemist4lyf

    stats question

    Mutually exlusive events are like this. Suppose you have A and B. A is heads, B is tails. Now if you get a heads, the probability of tails is 0, and vice versa. So over here, A is a three on WHITE DICE. And B is a three on BLUE DICE. So if you get, for suppose, a three on the white dice, the...
  7. Alchemist4lyf

    Maths, Addmaths and Statistics: Post your doubts here!

    Re: O'level Maths, Addmaths and Statistics help available he Same here. I really need help on that. Examiner Report says it's a scaling question. Just would like someone to help out on this one. :)
  8. Alchemist4lyf

    stats question

    (a)(i). Events that are mutually exclusive are C and D. This is because if one of them occurs, the other can not. For instance, if we get a (3,3). Then, we can not get a (4,4). (ii). Events that are independent are A and B. This is because, scoring a 3 on the white dice, will do nothing to...
  9. Alchemist4lyf

    Statistics Problem

    Oh.. that's good. Meaning i can easily do the working in centimeters, not inches. :D.. Thanks A lot. :D
  10. Alchemist4lyf

    Statistics Problem

    Assalamualaikum all. I'm having this problem that I'd like some help with. As you know, xtremepapers has all the past papers of statistics, and in the new ones (2009-2010) we are required to make graphs, on the question paper. Now, my problem is with the scales on those graphs that are already...
  11. Alchemist4lyf

    stats question

    5 - 9 Class. (i). Lower Class Limit = 5. Upper Class Limit = 9. (I'm not sure about this one, really.) (ii). Lower Class Limit = 5 - (0.5) = 4.5 Upper Class Limit = 9 + (0.5) = 9.5. (I'm sure about this one, because in such cases, where the continuous data seems to be discrete, you have to...
  12. Alchemist4lyf

    Statistics 2010 E.R and Mark Schemes?

    I haven't found the examiner reports or the mark schemes for 2010. If anyone has them, please let me know. Thank you :D
  13. Alchemist4lyf

    How can this be even possible people? :|

    Mine is like this. 17 Oct - Commerce p2. 14 Nov - Commerce p1 :D
  14. Alchemist4lyf

    stats question

    Alright. Thing is this. We want the end product to remain the same, that is, we want 8b 5r in X, and 9B, 6R in Y by the end. So, what we'll have to do, is select either the Blue, take it to Y, then place it back. Or either the Red, take it to Y, then place it back. So, let's consider the...
  15. Alchemist4lyf

    Little Help in Commerce Please.

    Salam. My problem is that, though i know the different methods of payments, i just tend to choose wrong methods when i attempt questions. For example, for a thing that requires a credit card, i might write a cheque is needed, and stuff like that. So i need help from someone who can give me a...
  16. Alchemist4lyf

    Cummulative Frequency Graphs

    Alright. So, then if they ask for a frequency polygon, i'm guessing i'm going to have to join point to point... Thanks mate.
  17. Alchemist4lyf

    Cummulative Frequency Graphs

    Salam. I have this small question. Can we, when drawing or sketching a cummulative frequency curve, draw straight lines, from POINT TO POINT?. Or do we have to make a proper free hand curve? That all. Thanks. :D
  18. Alchemist4lyf

    Sampling Concept I Didn't Quite Get

    Thanks A lot :)
  19. Alchemist4lyf

    Sampling Concept I Didn't Quite Get

    Assalam Everyone. I have this problem in Sampling in Statistics. I know the various types of sampling methods, and how to do them, but i get confused when the Random Digits come into the pictures. An example of this is in Oct 2006, Paper 2, Section B Question 9. I need help with the parts of...
  20. Alchemist4lyf

    Probability Question.

    Thanks Salman. I knew that, but it's good you wrote it down, cuz it'll start a whole discussion (might :P), like the one you started on Pk.studies when we were giving papers in June :)..
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