easy but i need answers

k8card · #1 Apr 17, 2007, 05:11 PM

uhh im confused this is prolly really easy to most ppl but i need help wut is the upper quartile and interquartilerange for these following questions

1.)56,45,37,43,10,34

2.)77,78,68,96,99,84,65

3.)30,90,40,70,50,100,80,60

4.)4,5.2,1,3,2.4,6,3.7,8,1.3,7.1,9

5.)25,56,13,44,0,31,73,66,4,29,37

6.)234,648,369,112,527,775,406,268,400

Capuchin · Apr 17, 2007, 11:38 PM

You need to put them in numerical order, then the upper quartile is the 75% piece of data, so it's the one that's 3/4 away from the bottom.. So if you have 12 pieces of data it's the 12*3/4 = 9th piece of data, if it doesnt fall on a piece of data, you'll have to work out where it is in between the 2 adjacent pieces of data.

The interquartile range is the difference between the 75%th and the 25%th pieces of data.

Let me know if you don't understand any of this



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