Life Expectancy of Shoes Records show that the average life expectancy of a pair of shoes is 2.2 years with a standard deviation of 1.7 years. A manufacturer guarantees that shoes lasting less than a year are replaced free. For every 1000 pairs sold, how many pairs should the manufacturer expect to replace free? Assume a normal distribution

3.3 Chebyshevâ€™s Rule and the Empirical Rule o Chebyshevâ€™s rule o Empirical rule: For a symmetric (bell shaped) distribution Example : Birth weights of females in the United States (full-term) have a bell-shaped distribution with mean of 7.54 pounds and a standard deviation of 0.61 pounds. Use the empirical rule to answer the following: 68% of U.S. female birth weights...