http://www.ck12.org Chapter 6. Measures of Central Tendency - Basic
What is the median number of hours the users spent on the Internet?
Solution:Using the TI83 calculator:
(Step One)
(Step Two)
Now go back to your list by repeatingStep One. Your numbers are now organized - in order from smallest to largest.
3 3 4 5 5 5 6 6 7 7
8 8 8 9 10 10 10 10 11 12
12 12 12 13 13 13 14 14 15 15
15 16 16 16 18 18 18 18 19 20
20 21 22 23 24 24 25 25 26 28
There is an even number of data so the median will be the mean of the number above and the number below the
n+ 1
2 =
50 + 1
2 =^25 .5 position. The number below is 13 and the number above is 13.
This result can be confirmed by using the TI83 calculator. You already have the data entered and sorted.
Therefore the median number of hours the users spent on the Internet was 13. Now you should be able to answer the
question that was posed at the beginning of the lesson. The boys had their waist measurements taken so they could
order team wind suits.
The results were:
Andy –27in. Barry –27in. Juan –23in. Miguel –27.5 in. Nick –28in.