lomhow1234 Posted February 14, 2017 Report Share Posted February 14, 2017 (edited) I'm in SL. Today we received our now graded quiz on distribution. Almost everyone got this one question wrong, our teacher said that we were "verifying it and not showing it". This specific terminology is new to me, I browsed some other educational forums in search of an example, but found only Public school teachers saying that there's no difference. What do you guys know about this? Is this an official IB thing or just being overly specific? Link to question Edited February 14, 2017 by lomhow1234 a question was asking for an opinion and not fact, my mistake Reply Link to post Share on other sites More sharing options...
kw0573 Posted February 14, 2017 Report Share Posted February 14, 2017 Show is to derive. Verify is plugging in the answer to see if works. 1 Reply Link to post Share on other sites More sharing options...
In terminal ass as mint Posted February 15, 2017 Report Share Posted February 15, 2017 4 hours ago, lomhow1234 said: I'm in SL. Today we received our now graded quiz on distribution. Almost everyone got this one question wrong, our teacher said that we were "verifying it and not showing it". This specific terminology is new to me, I browsed some other educational forums in search of an example, but found only Public school teachers saying that there's no difference. What do you guys know about this? Is this an official IB thing or just being overly specific? Link to question They want you to understand why k=3. To do this you don't simply plug in 3 into x. Since the probability is in a set of three numbers, P(X=1) + P(X=2) + P(X=k) must be equal to 1. Finding the probability of each of them gives: 1/14 + 4/14 + k^2/14 =1 5/14 + k^2/14 = 14/14 k^2/14 = (14-5)/14 k^2/14 = 9/14 k^2 = 9 k = +3 (do not write +- or you will lose a point, since the number of events cannot be negative) This should be the correct answer. Let me know if I missed anything or if you need clarification. 1 Reply Link to post Share on other sites More sharing options...
lomhow1234 Posted February 15, 2017 Author Report Share Posted February 15, 2017 12 hours ago, In terminal ass as mint said: They want you to understand why k=3. To do this you don't simply plug in 3 into x. Since the probability is in a set of three numbers, P(X=1) + P(X=2) + P(X=k) must be equal to 1. Finding the probability of each of them gives: 1/14 + 4/14 + k^2/14 =1 5/14 + k^2/14 = 14/14 k^2/14 = (14-5)/14 k^2/14 = 9/14 k^2 = 9 k = +3 (do not write +- or you will lose a point, since the number of events cannot be negative) This should be the correct answer. Let me know if I missed anything or if you need clarification. Ok yah, I think I got it. Thanks for the help man! Reply Link to post Share on other sites More sharing options...
In terminal ass as mint Posted February 17, 2017 Report Share Posted February 17, 2017 On 2/15/2017 at 1:06 PM, lomhow1234 said: Ok yah, I think I got it. Thanks for the help man! No problem. Good luck with studying 1 Reply Link to post Share on other sites More sharing options...
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