A 'questionnaire' is said to be reliable if it: MCQ with Answer and Explanation

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A 'questionnaire' is said to be reliable if it:

A. Measures what it intends to measure

B. Has many open-ended questions

C. Is long and detailed

D. Yields consistent results on repeated administration

Answer: Option D

Solution (By JKSSB Mock Tests)

Reliability refers to consistency of measurement.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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A person travels from A to B at 40 km/h and returns from B to A at 60 km/h. His average speed for the whole journey is:

A. 48 km/h

B. 50 km/h

C. 45 km/h

D. 52 km/h

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Correct Answer: Option A

Explanation:
For equal distances, use Harmonic Mean: 2ab/(a+b) = 2(40)(60)/(100) = 4800/100 = 48 km/h.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Which of the following statements about the circular test is correct?

A. The circular test is satisfied if P₀₁ × P₁₂ × P₂₀ = 1.

B. Fisher's ideal index satisfies it.

C. It requires that P₀₁ × P₁₀ = 1.

D. It is also known as the time reversal test.

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Correct Answer: Option A

Explanation:
Circular test checks consistency over multiple periods: the product of indices from 0 to 1, 1 to 2, and 2 back to 0 should equal 1. Time reversal is P₀₁×P₁₀=1.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Yule's coefficient of association Q is defined as (ad - bc)/(ad + bc), where ad = (AB)×(αβ) and bc = (Aβ)×(αB). This coefficient is also known as:

A. Coefficient of correlation

B. Coefficient of colligation

C. Coefficient of determination

D. Coefficient of concordance

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Correct Answer: Option B

Explanation:
Q is Yule's coefficient of association, also called coefficient of colligation.

This question belongs to: Accountancy and Statistics Statistics

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