Exercises:

1. Compute the standard deviation for your sample of two.
2. Check whether the sample voice of your partner lies inside or outside the ball described in Chebyshev's Inequality.

Chebyshev's Inequality is really a weak measure. If we know that a population is normally or even approximately normally distributed the probability in the above is actually .95. Take a few minutes to think whether or not the distribution of your ``voices'' should be approximately bell-shaped, and record your reasons below.