The mid-value of a class interval is 25 and the class width is 10. The class limits (exclusive) are: MCQ with Answer and Explanation

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The mid-value of a class interval is 25 and the class width is 10. The class limits (exclusive) are:

A. 15-25

B. 20-30 inclusive

C. 20-30

D. 25-35

Answer: Option C

Solution (By JKSSB Mock Tests)

Lower limit = mid-value - width/2 = 25 - 5 = 20; upper limit = 25 + 5 = 30.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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Which index number test checks if P₀₁ × P₁₂ × P₂₀ = 1?

A. Time reversal test

B. Circular test

C. Factor reversal test

D. Unit test

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Correct Answer: Option B

Explanation:
The circular test verifies consistency across three periods: the product of indices linking 0→1, 1→2, and 2→0 should equal 1 (or 100³ in percentage terms), ensuring transitivity in comparisons.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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If two distributions have the same mean but different standard deviations, which statement is TRUE?

A. They have identical shapes

B. Their modes must be equal

C. Their medians must be equal

D. The one with larger SD has more spread around the mean

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Correct Answer: Option D

Explanation:
Standard deviation measures dispersion; a larger SD indicates greater variability of observations around the mean, regardless of the mean's value or distribution shape.

This question belongs to: Accountancy and Statistics Statistics