luk3tm Posted April 26, 2009 Report Share Posted April 26, 2009 for the final maths SL exam (in just over 1 week or watever) do we have to memorize the 68.3-95.4-99.7 rule or can we just know it as the 68-95-99.7 rule, how much accuracy do we need to know this to cuz its not in the data bookletthanks Reply Link to post Share on other sites More sharing options...
Abu Posted April 26, 2009 Report Share Posted April 26, 2009 You don't need to know it at all. Just keep it at the back of your head for general knowledge. Reply Link to post Share on other sites More sharing options...
deissi Posted April 28, 2009 Report Share Posted April 28, 2009 the what? Reply Link to post Share on other sites More sharing options...
Max Posted April 28, 2009 Report Share Posted April 28, 2009 (edited) the what? The area between two standard deviations under the normal curve represents 68% of the entire area, the area between two standard deviations 95%, and between three standard deviations 99.7%. Edited April 28, 2009 by Max Reply Link to post Share on other sites More sharing options...
y.v Posted May 2, 2009 Report Share Posted May 2, 2009 for the final maths SL exam (in just over 1 week or watever) do we have to memorize the 68.3-95.4-99.7 rule or can we just know it as the 68-95-99.7 rule, how much accuracy do we need to know this to cuz its not in the data bookletthanksI am pretty sure that you do not need to have this memorized.However, how difficult is it anyways? Reply Link to post Share on other sites More sharing options...
Hedron123 Posted May 3, 2009 Report Share Posted May 3, 2009 I haven't seen a question of the sort in the Maths exam though I have seen it in Biology. I agree with y.v, it's not impossible to memorise it. Reply Link to post Share on other sites More sharing options...
deissi Posted May 3, 2009 Report Share Posted May 3, 2009 There's no need to memorize this because standard deviation and its meaning is not discussed in SL, we just need to know the value of it. Reply Link to post Share on other sites More sharing options...
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