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Epidemiology Exam 1
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Epidemiology Exam 1 Epidemiology Exam 1 Epidemiology Exam 1
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Epidemiology Exam 11. What are the three measures of central tendency?
(If applicable select all that apply)
a) median
b) mode
c) mean
d) range
e) all of the above
f) none of the above - ANS a,b,c
2. What is mean
(If applicable select all that apply)
a) sum of values divided by number of observations
b) the point where the number of observations above equals the number below
c) most frequently occuring value
d) from lowest to highest value (includes all values)
e) all of the above
f) none of the above - ANS a
3. What is easily influenced by extreme values?
(If applicable select all that apply)
a) median
b) mode
c) mean
d) range
e) all of the above
f) none of the above - ANS b
4. What is median?
(If applicable select all that apply)
,a) sum of values divided by number of observations
b) the point where the number of observations above equals the number below
c) most frequently occuring value
d) from lowest to highest value (includes all values)
e) all of the above
f) none of the above - ANS b
5. What is not easily influenced by extreme values?
(If applicable select all that apply)
a) median
b) mode
c) mean
d) range
e) all of the above
f) none of the above - ANS a
6. What is mode?
(If applicable select all that apply)
a) sum of values divided by number of observations
b) the point where the number of observations above equals the number below
c) most frequently occuring value and is the only way of describing "center" of data with no
numerical meaning
d) from lowest to highest value (includes all values)
e) all of the above
f) none of the above - ANS c
7. What are the three measures of dispersion?
(If applicable select all that apply)
a) range
b) standard deviation
c) inter-quartile range
,d) median
e) all of the above
f) none of the above - ANS a,b,c
8. What is a range?
(If applicable select all that apply)
a) from lowest to highest value (includes all values)
b) greatly influences by extreme values
c) the average difference of individual values from the mean
d) normal or near-normal distributions
e) all of the above
f) none of the above - ANS a,b
9. What is standard deviation?
(If applicable select all that apply)
a) from lowest to highest value (includes all values)
b) greatly influences by extreme values
c) the average difference of individual values from the mean
d) normal or near-normal distributions
e) all of the above
f) none of the above - ANS c
10. What is the appropriate use for standard deviation?
(If applicable select all that apply)
a) from lowest to highest value (includes all values)
b) greatly influences by extreme values
c) the average difference of individual values from the mean
d) normal or near-normal distributions
e) all of the above
f) none of the above - ANS d
, 11. What is an inter-quartile range?
(If applicable select all that apply)
a) ranking data from lowest to highest and dividing them into quartiles
b) greatly influences by extreme values
c) the average difference of individual values from the mean
d) normal or near-normal distributions
e) all of the above
f) none of the above - ANS a
12. What is the first quartile of the inter-quartile range?
(If applicable select all that apply)
a) mid-point below the median
b) mid-point above the median
c) for skewed distributions
d) right at the median
e) all of the above
f) none of the above - ANS a
13. What is the third quartile of the inter-quartile range?
(If applicable select all that apply)
a) mid-point below the median
b) mid-point above the median
c) for skewed distributions
d) right at the median
e) all of the above
f) none of the above - ANS b
14. When is the inter-quartile range appropriate?
(If applicable select all that apply)
a) mid-point below the median
b) mid-point above the median
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