A clinical laboratory scientist performs 30 replicate hemoglobin determinations on a single blood sample. When statistics are used to determine the precision of the method, the mean is 13.8 g/dL and 1 SD is 0.1 g/dL
This means that 95.5% of the results on this specimen lie:
a. Between 13.4 and 14.2 g/dL
b. Between 13.6 and 14.0 g/dL
c. Between 13.5 and 14.1 g/dL
d. Between 13.7 and 13.9 g/dL
ANS: B
Because 1 SD is 0.1 g/dL, 2 SD = 0.2 g/dL. Thus 95.5% of the results lie between 13.6 (±2 SDs) and 14.0 (+2 SDs).
You might also like to view...
Word Scramble: Sugar Gliders
SECNT NDALG
Answer the following statement(s) true (T) or false (F)
1. The real key to success in math is to fully understand the underlying concepts or principles from which mathematical formulas are derived. 2. Coulomb’s law describes the relationship of electrical charges and distance. 3. A decrease in SID will require an increase in mAs to maintain radiographic density between the two images taken at different SIDs. 4. kVp is the controlling factor for density and an influencing factor for radiographic contrast. 5. The 15% rule states that a 15% increase in kVp will result in a decrease in radiographic contrast and a doubling of radiographic density.