1. Given the following scenario, discuss the acceptance or rejection of an analysis based on quality

       control rules, including modified Westgard quality control rules.

QC 1: mean = 100 mg/dL, s = 2.5 mg/dL

QC 2: mean = 203 mg/dL, s = 2 mg/dL.

a. What is the 95% confidence interval for QC1?

b. What is 99% confidence interval for QC 1?

c.  What is the 95% confidence interval for QC2?

d.  What is the 99% confidence interval for QC2?

e.  What rule would you use to evaluate for a shift?

Sketch a Levy-Jennings plot for the analyte given the mean and std. dev. provided from the previous month.  You can take a picture with your phone and send as jpg or xls spreadsheet or make it like a table directly in word.

Given the following data were obtained from Control 1 and 2 for glucose during May:

day 1 QC 1: 94 mg/dL

day 1 QC 2: 204 mg/dL.

f.  Are any Westgard rules violated on day 1 and if so which rule?

g. What would you decide to do with patient results for day 1?

___2. On six consecutive days there has been a gradual downward change in results from both quality

      control samples. This may be solved by:

a. performing a trend analysis.

b. replacing aging controls.

c. replacing electronic board in the instrument.

d. performing %CV calculations.

3.  Serum Protein Electrophoresis Scenario

The Densitometric Standard read as follows:

Standard Result  Acceptable Range (%)

10% 8-12

20% 18-22

40% 38-42

60% 58-62

80% 78-82

100% 98-102

A. Do these results indicate an acceptable densitometry function?

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