In a frequency polygon, the points plotted are: MCQ with Answer and Explanation

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In a frequency polygon, the points plotted are:

A. Class midpoints vs frequencies

B. Cumulative frequencies vs upper boundaries

C. Lower limits vs frequencies

D. Upper limits vs frequencies

Answer: Option A

Solution (By JKSSB Mock Tests)

A frequency polygon connects the midpoints of histogram bars at their respective frequencies.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The value of a random variable that occurs with the highest frequency in a probability distribution is called the:

A. Median

B. Mode

C. Expected value

D. Variance

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Correct Answer: Option B

Explanation:
By definition, the mode represents the most probable or most frequent outcome.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The concept of 'population momentum' refers to:

A. Urbanization rate

B. Net migration

C. Tendency of population to grow despite declining fertility due to large reproductive-age population

D. Increase in life expectancy

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Correct Answer: Option C

Explanation:
Population momentum is the built-in growth potential resulting from a young age structure, even if fertility drops to replacement level.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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In a frequency distribution, the cumulative frequency of the last class is equal to:

A. Total frequency N

B. Number of classes

C. Zero

D. Class width

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Correct Answer: Option A

Explanation:
Cumulative frequency accumulates all frequencies; the last cumulative frequency equals total frequency.

This question belongs to: Accountancy and Statistics Statistics

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