If a dataset has a standard deviation of zero, then: MCQ with Answer and Explanation

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If a dataset has a standard deviation of zero, then:

A. Mean is zero

B. Median is zero

C. Data are missing

D. All values are equal

Answer: Option D

Solution (By JKSSB Mock Tests)

No variation implies all values are identical.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

Cumulative frequency curve is known as:

A. Frequency polygon

B. Bar chart

C. Histogram

D. Ogive

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Correct Answer: Option D

Explanation:
An ogive is a graph showing cumulative frequencies plotted against class boundaries.

This question belongs to: Accountancy and Statistics Statistics

Question #2

For perfect positive association between attributes A and B, we expect:

A. (αB) = 0

B. Both (Aβ) and (αB) = 0

C. (Aβ) = 0

D. (AB) = 0

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Correct Answer: Option B

Explanation:
Perfect positive association means all A's are B's and all B's are A's, so no A without B and no B without A.

This question belongs to: Accountancy and Statistics Statistics

Question #3

A life table radix l₀ of 100,000 means:

A. A hypothetical cohort of 100,000 births

B. Number of deaths

C. Life expectancy

D. The population size

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Correct Answer: Option A

Explanation:
l₀ is the initial number of individuals in the life table cohort.

This question belongs to: Accountancy and Statistics Statistics

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