# For the following precision data, calculate the mean, SD, and CV for each of the two...

###### Question:

For the following precision data, calculate the mean, SD,
and CV for each of the two control solutions A and B.

These control solutions were chosen because their con-
centrations were close to medical decision levels (XC) for

glucose: 120 mg/dL for control solution A and 300 mg/dL
for control solution B.

Control solution A was analyzed daily, and the follow-
ing values were obtained:

118, 120, 121, 119, 125, 118, 122, 116, 124, 123, 117,
117, 121, 120, 120, 119, 121, 123, 120, and 122 mg/dL.
Control solution B was analyzed daily and gave the
following results:
295, 308, 296, 298, 304, 294, 308, 310, 296, 300, 295,
303, 305, 300, 308, 297, 297, 305, 292, and 300 mg/dL.
Does the precision exceed the total allowable error
defined by the CLIA?

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