The postmaster of a small western town receives a certain nu…

The postmaster of a small western town receives a certain number of complaints each day about mail delivery. Determine three-sigma control limits using the following data.  Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Comp. 4 10 14 8 9 6 5 12 13 7 6 4 2 10 What is the UCL?  (Study Guide Question)

Specifications for a part for a DVD player state that the pa…

Specifications for a part for a DVD player state that the part should weigh between 24 and 25 ounces. The process that produces the parts has a mean of 24.5 ounces and a standard deviation of .2 ounce. The distribution of output is normal. What is the lower bound of the range in which 95.44 percent of the sample mean of this process will fall, if samples of n=16 are taken and the process is in control (random)? (Study Guide Question)