for the lower and upper quartiles, if: for the lower you devide the number by 4, and recieve an integer, that is your number. However if you recieve a number to a decimal point then you round it up.
Do you round quartiles?
For Lower Quartile:
If L1 is a whole number, the lower quartile is midway between the L1-th value and the next one. If L1is not a whole number, change it by rounding up to the nearest integer. The value at that position is the lower quartile.
Can the lower quartile be a decimal?
5 ( because Q2 is 50% ) times the number of values in your dataset. This is the same process you can use for any quartile or percentile. This is a WHOLE number (not a decimal).