Question

You have been given the following information and data from the last sample taken: Lower control limit for the range chart: 0 Upper control limit for the range chart: 10.6

Sample data: (13, 12, 12, 11)
Mean of the sample: 12.0
Which of the following conclusions can you make?
a. The sample is within specifications
b. The sample is out of specification
c. Need more sample information and the X-bar chart to make a decision
d. The process is not under control The process is under control

Answer 1

b. The sample is out of specification

Step-by-step explanation:

In the given situation, the sample data contains of 13, 12, 12, and 11 and the mean of the sample is 12.

Moreover, The lower control limit is zero and the upper control limit is 10.6.

So these both values does not came from the inside of the sample data so it cant be calculated

Therefore the option b is correct