If a constant is added to all observations, which of the following measures changes? MCQ with Answer and Explanation

If a constant is added to all observations, which of the following measures changes?

A. Range

B. Standard deviation

C. Variance

D. Arithmetic mean

Answer: Option D

Adding a constant changes the mean but not measures of dispersion.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

Which index method is best suited when a new commodity is introduced frequently over consecutive years?

A. Simple Aggregative Method

B. Chain Base Index

C. Laspeyres Method

D. Fixed Base Index

Correct Answer: Option B

Explanation:
The Chain Base method allows for the easy inclusion or deletion of items year-by-year, maintaining relevance.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

In the classification of data, 'chronological classification' refers to:

A. Grouping by magnitude

B. Grouping by attributes

C. Grouping by time

D. Grouping by geographical area

Correct Answer: Option C

Explanation:
Chronological means time-based.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

In a survey, 40% like tea, 60% like coffee, and 20% like both. The percentage who like neither is:

A. 80%

B. 20%

C. 0%

D. 60%

Correct Answer: Option B

Explanation:
P(T∪C)=40+60-20=80%, so neither = 100-80 = 20%.

This question belongs to: Accountancy and Statistics Statistics