Add up the frequencies to find the total number of values in the table/chart/data set. Divide that number by 2. If the total # of values is odd, then you will get a decimal & you round that decimal up to the next whole number to find the median value. If that total # of values is even, then you get a whole number and you take that number and the next largest whole number (increase it by 1) and average those two values to get the median. These calculations tell you which "value/values" are the median values and then you will count in the chart until you reach that value/values. You can count from the bottom or the top, it doesn't matter. Example: Say there are 20 total values (frequencies) in a chart. 20/2 = 10 & 20 = even. Therefore, the median will be the average of the 10th & 11th values. So you start at the bottom (or the top) of the chart/table and then count until you get to the 10th & 11th values. Then average those 2 numbers. Now say the chart has 21 total values (frequencies). 21/2 = 10.5 & 21 = odd. Round 10.5 -> 11. The 11th value will be the median (basically 10 below it and 10 above it). Start at the bottom or top and count until you get to the 11th value. When I say "count in the chart" I mean, count along the frequency column. So after the first two, you're at 4, then after the 2nd row (value = 15), you have 7 total values (4 + 3), after the 3rd row (value = 20), you have 9 total values (4 + 3 + 2). Then whenever you land on the row that you are looking for (10th, 11th, 50th, etc.), you take the number from the value column. Let me know if you have further questions. Answer from jwmathtutoring on reddit.com