5.5. Median of Large Sets of Data http://www.ck12.org
Step 2:
The numbers that you entered into L1 are now sorted from smallest to largest.
Step 3:
You can now scroll down the list to reveal the ordered numbers.
There are 50 data values in the table. The median will be the mean of the number before then+ 21 position and the
number after then+ 21 position:n+ 21 =^50 + 21 =^512 = 25 .5. The number before the 25.5 position is 19, and the number
after the 25.5 position is 21. This means that the median is^19 + 221 =^402 =20.
2 3 3 5 6 7 7 8 9 9
10 10 11 12 13 15 15 16 16 17
17 18 18 19 19 21 21 23 23 24
25 26 27 28 29 31 32 33 33 35
36 37 37 38 40 40 41 41 42 46
Example B
Calculate the median in Example A without sorting the data.
The following are 2 ways that you can use the TI-83 to determine the median of the values without sorting the data.
Method One:
All of the data values have been entered into L1. The median of the data values can now be determined by using the
TI-83 as follows:
Med = 20 indicates that the median of the data values in L1 is 20.
Method Two: