Q1: A process uses statistical process control. The mean of all sample means is 32 units. The mean of all sample ranges is 2.2 units. There were 10 samples taken each with 4 observations. Calculate the upper control limit for the x-bar chart.

a. 32.682 units

b. None of these answers is even close

c. 24.966 units

d. 10.602 units

e. 33.606 units

Q2: A process uses statistical process control. The mean of all sample means is 32 units. The mean of all sample ranges is 2.2 units. There were 10 samples taken each with 4 observations. Calculate the upper control limit for the R chart.

a. 4.400 units

b. None of these answers are even close

c. 3.916 units

d. 5.016 units

e. 0 units

Q3: A process uses statistical process control. The mean of all sample means is 32 units. The mean of all sample ranges is 2.2 units. There were 10 samples taken each with 4 observations. Calculate the lower control limit for the R chart.

a. 0.220 units

b. 1.780 units

c. 0.484 units

d. None of these answers is even close

e. 2.200 units

Q4: A process uses statistical process control. The mean of all sample means is 32 units. The mean of all sample ranges is 2.2 units. There were 10 samples taken each with 4 observations. Calculate the lower control limit for the x-bar chart.

a. 0.000 units

b. 32.000 units

c. None of these answers is even close

d. 31.318 units

e. 30.394 units