The number of classes in a frequency distribution is determined by: MCQ with Answer and Explanation

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The number of classes in a frequency distribution is determined by:

A. Median only

B. Range of data and number of observations

C. Mode only

D. Mean of data

Answer: Option B

Solution (By JKSSB Mock Tests)

Class intervals are chosen based on the spread and size of data.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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A census method where people are counted based on their legal or permanent residence regardless of where they are on census night is:

A. De facto method

B. De jure method

C. Householder method

D. Canvasser method

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Correct Answer: Option B

Explanation:
De jure census attributes individuals to their usual or legal place of residence.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The number of observations falling in a particular class is called:

A. Class mark

B. Class frequency

C. Relative frequency

D. Cumulative frequency

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Correct Answer: Option B

Explanation:
Class frequency is the count of data points within a class interval.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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If a population has a high proportion of young people, the crude death rate may be low even if age-specific rates are high. This is an example of:

A. Age structure effect

B. Reverse causality

C. Direct standardization

D. Sampling error

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Correct Answer: Option A

Explanation:
A young population has fewer old people where mortality is high, thus CDR can be low.

This question belongs to: Accountancy and Statistics Statistics

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