If the variance of a dataset is 16, the standard deviation is: MCQ with Answer and Explanation

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If the variance of a dataset is 16, the standard deviation is:

A. 256

B. 8

C. 2

D. 4

Answer: Option D

Solution (By JKSSB Mock Tests)

SD = √variance = 4.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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A median can be determined graphically using:

A. Histogram

B. Ogive (Cumulative Frequency Curve)

C. Scatter diagram

D. Pie chart

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Correct Answer: Option B

Explanation:
The median is found graphically by plotting the 'less than' and 'more than' ogives; their intersection point corresponds to the median.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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If the Laspeyres price index for a commodity basket is 140 and the Paasche is 135, Fisher's index is:

A. 137.5

B. 140

C. 135

D. 137.47

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Correct Answer: Option D

Explanation:
√(140×135) = √18900 ≈ 137.477.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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A good questionnaire should have:

A. Double negatives for clarity

B. Questions arranged in random order

C. Many open-ended questions to confuse

D. Simple and clear language

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Correct Answer: Option D

Explanation:
Clarity and simplicity are fundamental principles.

This question belongs to: Accountancy and Statistics Statistics

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