The algebraic sum of the deviations of a set of values from their arithmetic mean is always: MCQ with Answer and Explanation

The algebraic sum of the deviations of a set of values from their arithmetic mean is always:

A. Zero

B. Negative

C. Minimum

D. Positive

Answer: Option A

A fundamental property of the arithmetic mean is that the sum of deviations of items from the mean is identically zero.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

Which index number formula uses the unweighted geometric mean of price relatives?

A. Jevons

B. Paasche

C. Fisher

D. Laspeyres

Correct Answer: Option A

Explanation:
The Jevons index is the geometric mean of the price relatives, giving equal weight to each item.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

In a class, 60% students pass in English and 70% in Mathematics. 20% fail in both. The percentage that pass in at least one subject is:

A. 60%

B. 80%

C. 90%

D. 50%

Correct Answer: Option B

Explanation:
Pass in at least one = 100% - fail in both = 100% - 20% = 80%.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

Life expectancy at birth is derived from:

A. Census

B. Fertility rates

C. Crude death rate

D. Life table

Correct Answer: Option D

Explanation:
Life tables combine age-specific mortality rates to compute life expectancy.

This question belongs to: Accountancy and Statistics Statistics