When constructing a frequency polygon, the frequencies are plotted against: MCQ with Answer and Explanation

Question

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When constructing a frequency polygon, the frequencies are plotted against:

A. Upper class limits

B. Lower class limits

C. Class marks (midpoints)

D. Cumulative frequencies

Answer: Option C

Solution (By JKSSB Mock Tests)

A frequency polygon connects the points formed by the class frequencies plotted at the exact midpoints of the class intervals.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

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In probability, the sample space for drawing one card from a standard deck has how many outcomes?

A. 4

B. 52

C. 26

D. 13

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Correct Answer: Option B

Explanation:
A standard deck has 52 distinct cards (4 suits × 13 ranks), so the sample space for a single draw contains 52 equally likely elementary outcomes.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The condition that the ultimate class frequencies must be non-negative ensures:

A. Association

B. Consistency of data

C. Positive association

D. Independence

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Correct Answer: Option B

Explanation:
Consistency requires all ultimate frequencies to be ≥ 0, otherwise the data contain contradictions.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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A box contains 5 red and 3 green balls. Two balls are drawn without replacement. Probability that both are red is:

A. (5/8)²

B. (5/8) × (3/7)

C. (5/8) × (4/7) = 5/14

D. (5/8) + (4/7)

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Correct Answer: Option C

Explanation:
First red: 5/8, second red given first red: 4/7. Product = 20/56 = 5/14.

This question belongs to: Accountancy and Statistics Statistics

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