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ATI LPN · Community Health · Epidemiology Quiz Questions

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

The geometric mean is the value that:

A. Is midway between the lowest and highest value on a log scale

B. Occurs most often on a log scale

C. Has half the observations below it and half above it on a log scale

D. Is statistically closest to all of the values in the distribution on a log scale

Expert Explanatory Rationale

Correct Answer: Is midway between the lowest and highest value on a log scale

Question 2 of 5

Suggest other examples of how epidemiology might be applied to study the causality of disease.

A. Investigating the link between air pollution and respiratory diseases.

B. Studying the impact of diet on cardiovascular health.

C. Examining the relationship between smoking and lung cancer.

D. All of the above.

Expert Explanatory Rationale

Correct Answer: All of the above.

Question 3 of 5

The common characteristic that both experimental and quasi-experimental study should possess is

A. Manipulation

B. Control groups

C. Randomization

D. None

Expert Explanatory Rationale

Correct Answer: Manipulation

Question 4 of 5

Two automated blood cell counters are tested twice using a prepared suspension of leukocytes containing 8,000 cells/mm3. The cell counts by device A are 8,400 cells/mm3 the first time and 8,350 cells/mm3 the second. Device B's counts are 8,200 and 7,850 cells/mm3, respectively. Which device(A or B) gives leukocyte counts with greater validity?

A. Device A

B. Device B

C. Both devices have equal validity

D. Neither device is valid

Expert Explanatory Rationale

Correct Answer: Device A

Question 5 of 5

Clinical case of JE was first reported in

A. 1976

B. 1978

C. 1980

D. 1982

Expert Explanatory Rationale

Correct Answer: 1976

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