Nokea
Why is the availability of a reliable and safe water source a concern to officials in the United States and the rest of the world?
- A. Waterborne diseases, scarcity issues.
- B. Abundant freshwater reserves globally.
- C. Low demand for clean water.
- D. Complete reliance on desalination.
Correct Answer: A
Rationale: Access to safe water prevents waterborne diseases and addresses growing scarcity concerns worldwide.
You may also like to solve these questions
Which of the following meats contains more cholesterol and triglycerides
- A. pork meat
- B. beef meat
- C. fish
- D. all
Correct Answer: A
Rationale: Pork meat generally contains higher levels of cholesterol and triglycerides compared to other meats.
You are conducting a study of insulin resistance and its relationship to body weight. Using a weight scale as your instrument to measure body weight, you find the scale always reads 30 kg regardless of who is standing on it. Discuss the validity and reliability of the scale.
- A. The scale is reliable but not valid.
- B. The scale is neither reliable nor valid.
- C. The scale is valid but not reliable.
- D. The scale is both reliable and valid.
Correct Answer: A
Rationale: Reliability refers to consistency of the measurement, which this scale demonstrates by consistently reading 30 kg. However, validity refers to accuracy, which this scale lacks since it does not measure true weight.
Describe the significance for epidemiology of the use of vital statistics.
- A. Vital statistics provide data on births and deaths.
- B. Vital statistics are irrelevant to epidemiology.
- C. Vital statistics are used only for economic analysis.
- D. Vital statistics focus solely on infectious diseases.
Correct Answer: A
Rationale: Vital statistics help track population health trends and identify outbreaks or patterns.
Which of the following are considered measures of spread?
- A. Interquartile range
- B. Percentile
- C. Range
- D. Standard deviation
Correct Answer: A
Rationale: The interquartile range is a robust measure of variability.
Define in your own words the term 'secular changes'.
- A. Long-term trends in disease patterns over years or decades.
- B. Short-term fluctuations in health data.
- C. Changes in healthcare policies.
- D. Seasonal variations in disease incidence.
Correct Answer: A
Rationale: Secular changes refer to long-term trends in disease patterns, often spanning years or decades, and are distinct from short-term or seasonal variations.