What Is 1st And 3rd Quartile. Further they could be given as the upper quartile or the lower quartile. The second quartile Q 2 is easy to find.
If you got a whole number when multiplying by N add 05 instead of rounding up. The median is half way through. It will put the complete list of numbers in an order.
The quartiles are the 25th 50th and 75th percentiles.
If the number of data points is a multiple of 4 there is a largest number in the lowest quarter and a smallest number in the highest three quarters. When you are given your class rank divide it by the total number of students in the class. The first quartile Q 1 is the 25th percentile. If the number of data points is a multiple of 4 there is a largest number in the lowest quarter and a smallest number in the highest three quarters.
