Question

An automatic filling machine is used to fill 1-liter bottles of cola. The machine’s output is approximately normal with a mean of 0.95 liter and a standard deviation of 0.05 liter. Output is monitored using means of samples of 28 observations. Use Table-A.

a.Determine upper and lower control limits that will include roughly 97 percent of the sample means when the process is in control.(Do not round intermediate calculations. Round z value to 2 decimal places. Round your answers to 4 decimal places.)

Upper control limits:	liter
Lower control limits:	liter

b.Given these sample means: 1.005, 1.001, .998, 1.002, .995, and .999, is the process in control?

• No
• Yes

Answer 1