In data classification, 'class width' refers to: MCQ with Answer and Explanation

In data classification, 'class width' refers to:
A. The difference between upper and lower class limits
B. The frequency of the modal class
C. The midpoint of a class interval
D. The number of classes in the distribution
Answer: Option A
Solution (By JKSSB Mock Tests)
Class width (or class size) is the difference between the upper and lower boundaries of a class interval, determining the range of values grouped together in a frequency distribution.

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Practice More Statistics Questions

Question #1
The sex ratio (females per 1000 males) in India according to Census 2011 is:
A. 940
B. 933
C. 943
D. 927

Correct Answer: Option C


Explanation:
India's overall sex ratio in 2011 was 943 females per 1000 males.

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The primary source of vital statistics in most countries is:
A. National sample surveys
B. Civil registration systems
C. Hospital records only
D. Census reports

Correct Answer: Option B


Explanation:
Civil registration systems continuously record vital events (births, deaths, marriages) at the local level, providing the most timely and comprehensive source for vital statistics when well-functioning.

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Question #3
Crude Death Rate of 8 per 1,000 implies that in a population of 1 million, annual deaths are approximately:
A. 80,000
B. 800,000
C. 8,000
D. 800

Correct Answer: Option C


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CDR = (Deaths / Population) × 1,000 → Deaths = (CDR × Population) / 1,000 = (8 × 1,000,000) / 1,000 = 8,000. Simple application of the rate formula.

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