1.
Quality control charts are
useful in demonstrating:
a. mean values d. proper methods
b. accuracy e. coefficient of variation
c.
analytical trend
2.
When a range is set by taking
the mean value plus minus two standard deviations, the percentage of values of
the normal population EXCLUDED from the acceptable range is:
a. 13.6 % d.
2.5 %
b. 5 % e.
NIL
c. 15.9 %
3.
The following may be used to
analyze quality control data, EXCEPT:
a. Levey-Jennings
plot d.
Westgard Rules
b. Shewhart Plot e.
NIL
c. trends and shifts
4.
The extent to which
measurements agree to the true value of the quantity being measured is known
as:
a. acceptable
limits c. precision e. NIL
b. accuracy d. reliability
5.
The reproducibility of test
measurements is referred to as:
a. accuracy c.
quality control e. NIL
b. precision d.
reliability
6.
The middle value of a set of
numbers that are arranged according to their magnitude is known as:
a. arithmetic mean c. median e.
NIL
b. geometric mean d.
mode
7.
In a Gaussian distribution, the
+- 2 SD range includes the following percentage values:
a. 31.6 % c.
12.7 % e. NIL
b. 68.3 % d. 95.7%
8.
Calculate the coefficient of variation when +- 1SD = +-7 mg/dL and the
mean is 89 mg/dL:
a.
6.4 % c.
12.7 % e. NIL
b.
7.9 % d.
15.7 %
9.
When establishing a reference
range, it is most desirable to obtain
specimens from at least the following number of individuals:
a. 25 c.
75 e. NIL
b. 50 d. 100
10.
Which of the following should
be taken into consideration when establishing a reference range?
a. age d. both a & b
b. sex e.
NIL
c.
Sampling time
11.
When data fluctuation are due
to chance and results are seen to vary in either direction, the problem is
referred to as:
a.
experimental error e. NIL
b.
random error
c.
systematic error
d.
all of the above
12.
The process that encompasses
all aspects of laboratory operation including patient ID, specimen collection,
assaying and recording is:
a. quality assurance c. quality
control e. NIL
b. reliability d.
internal control
13. The following Westgard Rules
indicate a random error:
a.
1 (2S), 1 (3S), R (4S)
b. 10 X , 2 (2S), 1(3S)
c. 2 (2S), 1 (2S), 1 (3S)
d. R (4S), 2 (2S), 2 (1S)
e. NIL
14.
What assistance does an
external quality assurance program provide for the laboratory?
a.
Means to correlate test
performed by different departments within the same laboratory.
b.
Evaluation of its performance by comparison with
other laboratories using the same method
c.
Data checks with previous tests
on the same patient
d.
Limits for reference intervals
e.
NIL
15. A sudden shift in daily values in a Q.C chart is
likely to be the result of:
a.
Changing an
operating technologist
b.
Replacing the instruments
sample aspiration probe
c.
Changing the spectrophotometer
lamp In the middle of the sample run
d.
Running new standards
concurrently with the current
standard lot
e.
NIL
16. Which of these are classified as random errors?
1.
Mislabeling of sample
2.
Improper mixture of sample and
reagent
3.
Sample instability
4.
Deterioration of reagent
A.
1 and 2 B. 3 and 4 C. 1,2 and 3 D. all
of the above E. NIL
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