Class 12 Biology · Chapter 10 · Test 1
Biostatistics Measures
47 MCQs
47 questions · 34 min · 47 marks
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Sample questions
The first 5 of 47. Try each one, then tap to see the answer.
Question 1
Which of the following is a primary data collection method?
- AGovernment reports
- BPublished articles
- CExperiment and surveys
- DOnline databases
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Answer: C
Primary data is collected directly through experiments, surveys, interviews, observations and clinical trials.
Question 2
What does mode represent in a dataset?
- AThe average of values
- BThe value occurring most frequently
- CThe difference between two values
- DNone of these
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Answer: B
The mode is the value that appears most often in a dataset.
Question 3
Which statistical measure is also called the 50th percentile?
- AMean
- BMedian
- CMode
- DRange
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Answer: B
The 50th percentile is the value below which 50% of the data lie which is the median.
Question 4
If the maximum value in a dataset is 50 and the minimum value is 20, what is the range?
- A30
- B25
- C20
- D115
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Answer: A
Range = maximum - minimum = 50 - 20 = 30.
Question 5
What does it mean if the 40th percentile value is 148 cm?
- A40% of values are above 148 cm
- B40% of values are below or equal to 148 cm
- CAll the values are equal to 148 cm
- D60% of values are above 148 cm
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Answer: B
The 40th percentile is the value below or at which 40% of observations fall.
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