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

Gage resolution is

A vendor provides a concentrated tomato paste used in making a frozen food product.   The vendor specifications indicate that there is 26% +/- .05% natural tomato soluble solids in the product.  A sample of size 20 is taken from supplied product. The average reading is 25.44% with a standard deviation of 0.06%.  To determine the confidence interval for the true mean for the parameter which distribution should be used?

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.

A sample of size 50 is taken from a population.  The mean of the sample is 41 and standard deviation is 2.9.  What is the 95% confidence interval for the true mean?

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 test statistic is

If a normality plot for a set of sample data looks like  The associated histogram of the data would look most like

The value D3 used in establishing control charts is used to

The value A3 used in establishing control charts is used to