The sum of frequencies of all classes in a distribution equals: MCQ with Answer and Explanation

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The sum of frequencies of all classes in a distribution equals:

A. Total number of observations

B. Number of classes

C. 100

D. Mean

Answer: Option A

Solution (By JKSSB Mock Tests)

Total frequency = N, the number of observations.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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In a continuous frequency distribution, the class interval '10-20' means the class includes:

A. Only the values 10 and 20

B. Values greater than 20

C. Values from 10 up to exactly 20

D. Values from 10 up to but not including 20 (in an exclusive series)

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Correct Answer: Option D

Explanation:
In standard exclusive class intervals, the lower limit is included, but the upper limit is excluded and falls into the next class.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Neonatal mortality rate covers deaths of infants aged:

A. 0-28 days per 1000 live births

B. 0-1 year

C. 0-7 days

D. 1 month to 1 year

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Correct Answer: Option A

Explanation:
Neonatal period is the first 28 days of life. NMR = (Neonatal deaths / Live births) × 1000.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Standardized Death Rate allows comparison by:

A. Focusing only on infant deaths

B. Using the same crude death rate formula for all populations

C. Applying age-specific rates to a common standard population

D. Ignoring age structure entirely

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Correct Answer: Option C

Explanation:
SDR eliminates age structure effects by calculating what the death rate would be if the population had the age distribution of a standard population, enabling unbiased mortality comparisons.

This question belongs to: Accountancy and Statistics Statistics

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