If a normal distribution has a mean of 100 and a standard deviation of 20, what percentage of the data falls between 60 and 140?

In this data set the median is:  71 73 84  88 91 91 98 102 104 104 104 105 106 109 110 110 111 112 112 112 113 114      

A patient’s glucose result is “flagged” with the comment “ results exceed the upper limit of linearity.” The method’s upper limit of linearity is 700 mg/dL. The technologist prepares a 1 to 5 dilution of the serum specimen with saline and reanalyzes the diluted sample. A result, 152 mg/dL, is displayed. What is the concentration of glucose in this patent’s serum sample?

One of the assays your laboratory carries out requires a 2N HCl.  You have a stock bottle of concentrated HCl with a specific gravity of 1.18 and purity of 36%.  What volume of the concentrated HCl is required to make 250mL of the 2N HCl (MW of HCl = 36.5 Da)?

Over 99% of specimen identification errors that occur by laboratory personnel result from:

Over 99% of specimen identification errors that occur by laboratory personnel result from:

Which of these has 1⁄2 of the points above and 1⁄2 below?

What should the mean value of the QC material be in the above chart?

Which of these is affected by extreme values

Which of these is not a measure of variation?