#1. Find the mean of the sample.
\(11, 5, 19, 15, 2\)

#2. Find the median of the sample.
\(\frac{-1}{3}, 1, \frac{3}{2}\)

#3. Find the mode of the sample.
\(-8, -5, -4, -2, -1, 3, 4, 5, 9\)

#4. Find the range of the sample.
\(\frac{4}{3}, 0, -4, \frac{1}{3}, 2, \frac{3}{2}\)

#5. Find the lower quartile of the sample.
\(\frac{-1}{2}, \frac{-1}{4}, 3\)

#6. Find the lower quartile of the sample.
\(-3, -6, 6\)

#7. Find the upper quartile of the sample.
\(\frac{2}{3}, \frac{3}{4}, 1, \frac{3}{2}, 3\)

#8. Find the upper quartile of the sample.
\(-2, -4, -4, -9, 1, -7, 7, 5, 9, 0\)

#9. Find the inner quartile range (IQR) of the sample.
\(\frac{-3}{2}, \frac{-1}{2}, \frac{1}{4}, \frac{1}{2}, \frac{2}{3}, \frac{3}{4}, \frac{3}{2}, 2\)

#10. Find the inner quartile range (IQR) of the sample.
\(-9, -8, -4, -1, 2, 4, 6, 7, 7, 8\)

#11. Find the mean absolute deviation (MAD) of the sample.
\(-3, \frac{-1}{2}, 4, 0, \frac{2}{3}\)

#12. Find the mean absolute deviation (MAD) of the sample.
\(-5, 3, 5, -2, 1, 0\)

#13. Find the mean absolute deviation (MAD) of the sample.
\(2, 4, 5, 5, 7, 7, 8, 8, 9, 10\)

#14. Find the mean absolute deviation (MAD) of the sample.
\(1, 10, 6, 8, 5, 6, 2\)