Problem:
Compute the mean of ${-\frac{29}{\pi }, \frac{3}{\pi }, \frac{21}{\pi }, \frac{13}{\pi }, \frac{5}{\pi }, \frac{26}{\pi }}$.
Answer:
$\frac{13}{2 \pi }$
{'source': 'AMPS', 'file': 'amps/mathematica/counting_and_statistics/mean/27363.txt'}