The mean deviation of the numbers 3, 4, 5, 6, 7
Mean \(\bar X = \frac{3+4+5+6+7}{5}\)
\(\bar X = \frac{25}{5}\)
\(\bar X = 5\)
Xi |
(xi - mean) |
3 |
-2 |
4 |
-1 |
5 |
0 |
6 |
1 |
7 |
2 |
\(\Sigma x_i = 25\) |
\(\Sigma d_i = 0\) |
Mean deviation = \(\frac{\Sigma d_i}{\Sigma x_i}\)
Mean deviation = \(\frac{0}{25}\)
Hence, Mean deviation is 0