A Packaging Company Strives to Maintain a Constant Temperature for Its

Multiple Choice

A packaging company strives to maintain a constant temperature for its packages that require a specific temperature range. It is believed that the temperature of packages follows a normal distribution with a mean of 5 degrees Celsius and a standard deviation of 0.3 degree Celsius. Inspectors take weekly samples for 5 weeks of eight randomly selected boxes and report their temperatures. The five weekly sample means are shown in the table below. How many points are outside the control limits?

A) 1
B) 2
C) 3
D) 4