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Higher level maths interquartile ranges?
by JessicaA Junior Cert Mathematics — 12/06/16 5

I'm finding difficulty solving for the interquartile ranges can anyone help me wit exam papers or something plz?


5 Comments
Study2000 — 11/06/16
I can help u with any exam paper question. Just type it here and i will give u a step by step answer!
Study2000 — 11/06/16
Interquartile Range Example: 5,3,9,8,7,1,2,3 1- Put the numbers in order: 1,2,3,3,5,7,8,9 2- 1/4 multiplied by the amount of numbers there are: 1/4 multiplied by 8 3- 1/4 multiplied by 8 is 2. 4- Because the answer is even (2) u will take the 2nd and 3rd number and add them and divide by 2. If number was (2.5 or 3.7 or anything that is not a whole number) round up. So if number was 3.7 u will get the 4th number in the list of number. 5- 2+3=5. 5/2= 2.5. 2.5 is your lower quartile (Q1) 6- Now get 3/4 of the numbers. 7- 3/4 multiplied by 8 = 6 8- Get 6th and 7th number and again divide by 2. 9- 7+8 = 15. 15/2 = 7.5 . 7.5 is your upper quartile (Q3) 10- Finally (Q3) 7.5 - (Q1) 2.5. Answer is 5 Hope this helps:)
JessicaA — 12/06/16
Thx so much that really hepled
Study2000 — 12/06/16
No problem:)
KxngOfDeezNuts — 12/06/16
What paper and question was that @study200
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