-8.
The numbers can be generated by the following quadratic:
t(n) = -6n2 + 23n - 4 for n = 1, 2, 3, ...
13 + 9 + 2 + 11 + 18 + 13 = 66/6 = 11
The next figure would be 21, followed by 11 & 10.
13/18 is smaller
What's Trending - 2011 Week 18 - 09 13 11 1-18 was released on: USA: 13 September 2011
13/18 = 11/6
11 is to 13 and 18 is to 25
11-13 Year olds-11 to 13 grams of fibre a day Adults 18 or older-18 grams a day
There are two modes: 2 and 18
Here Comes the Hotstepper was created on 1994-11-18.
15
The sequence could continue: 7, 12, 9, 15, 11, 18, 13, 21, ...
sorted sample: 8 8 9 11 13 17 18 number of elements: 7 middle element and, therefore, the median: 11