The heights of new born babies have a symmetric distribution with a mean of 20 inches and a SD of 2 inches. Find the percentage of new born babies whose height is between 18 in. and 22 in.

Answer the following questions.

1. Do you apply Chebyshev's Theorem or Empirical Rule?
2. What is k? Remember that "k" is the number of standard deviations from the mean.
3. The percentage of new born babies whose height is between 18 inches and 22 inches is