1) Leah's Toys makes rubber balls. The current process is capable of prodicing balls that weigh on average 3 ounces with a standard deviation of .25 ounces. What is the PCR, assuming upper and lower tolerance limits of 3.5 and 2.5 ounces. Is Leah's able to meet the tolerance limits 99.7% of the time? Explain.
2) Suppose Leah's Toys invests in process improvements that lower the standard deviation in Problem 2 to just .10 ounces. Is this enough for Leah's to achieve Six Sigma levels with regards to the weight of the balls? Explain.