The following is a sample of 25 measurements:

a. Compute T, s2, and s for this sample.

b. Count the number of measurements in the intervals -

x & s,T f 2s, T & 3s. Express each count as a percentage of the total number of measurements.

c. Compare the percentages found in part b to the percentages given by the Empirical Rule and Chebyshev's Rule.

d. Calculatc lhe range and use it to obtain a rough approximation for s. Does the result compare favorably with the actual value for s found in part a?
Applying the Concepts