Sandy Posted May 9, 2016 Report Share Posted May 9, 2016 From a probability function, lets take f(x)=x^-2, how do you fin the interquartile range? Reply Link to post Share on other sites More sharing options...
Odelouche Posted May 9, 2016 Report Share Posted May 9, 2016 Hi, First of all, that function has to have a given domain and has to be continuous within that domain. Also, the integration of that function from the lower limit of the domain to the higher limit has to be equal to 1. Those are the conditions, now that you're given such a function, you need to find Q3 and Q1. To find Q1, you write the integration of the function from the lower limit of the domain to m, and set that integration equal to 0.25. Q1 = m. To find Q3, you do the same thing, only the integration is equal to 0.75 this time. Q3 should be bigger than Q1, and they should both be in the range of your domain (otherwise something has gone wrong). To calculate IQR, simply subtract Q1 from Q3. Hope this helps 2 Reply Link to post Share on other sites More sharing options...
Sandy Posted May 9, 2016 Author Report Share Posted May 9, 2016 Thanks Odelouche Reply Link to post Share on other sites More sharing options...
Odelouche Posted May 9, 2016 Report Share Posted May 9, 2016 Happy to help Good luck for tomorrow! Reply Link to post Share on other sites More sharing options...
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