Chi -squared test statistic

Hi there,

This is a statistics question so I hope someone can help:

I need the Chi test statistic for the following observed (first data set) and expected (second data set) frequencies. My answer keeps coming up wrong 12.864 and I have no idea why.
Thanks for your quick response!

(1)

5
14
25
24
13
11
8








(2)

8.3794
13.3902
21.0881
23.4181
18.3379
10.1248
5.2616