A process is to be centered at 3.00″. A sample is taken from the process and has a mean of 3.02. Which of the following should be used as a null hypothesis to test whether or not the process is achieving the target mean?

I have no other papers than the stapled packet and scratch paper on the surface I am working at.  I will access no additional reference materials during the exam. Note:  Failure to adequately meet this requirement will result in disqualification of your test score and you will be required to take a cumulative exam over the course material, on campus, in order to determine if you pass.

A controlled process has a mean of 50.2 and standard deviation of 0.2. The specification limits for a part on the process are 50±0.8. Cpk for this process is

A process is in control with control limits established with  = 40,    =4 and n=4. The standard deviation for the process is can be estimated as

I have only one blank sheet of paper to use for scratch paper.  I understand that this is the only piece of paper that I am allowed to write on during the exam. I have shown the camera the front and back of my scratch page. Note:  Failure to adequately meet this requirement will result in disqualification of your test score and you will be required to take a cumulative exam over the course material, on campus, in order to determine if you pass.

A local environmental group is concerned about increasing mineral content near a new manufacturing facility.  Three years ago the silica content in a local river was determined to be 23 mg/L (in the range of 5 to 25 mg/L commonly found in natural waters).  Recently, 6 samples were taken which had an average of 26 mg/L and standard deviation of 1.6 mg/L.  An hypothesis test is to be performed to see if, with a confidence level of 90%, the silica level has increased.  For this hypotheses test, the t critical value which the test statistic should be compared to is

A controlled process has a mean of 50.2 and standard deviation of 0.2. The specification limits for a part on the process are 50±0.8. Cpk for this process is

A process is in control with control limits established with  = 40,    =4 and n=4. The standard deviation for the process is can be estimated as

I have the allowed pages and the pages are stapled together.   I have shown each of these pages, front and back, to the webcam. Note:  Failure to adequately meet this requirement will result in disqualification of your test score and you will be required to take a cumulative exam over the course material, on campus, in order to determine if you pass.

To define a process, which of the following elements should be included?