The geometric mean of 1, 3, 9 is: MCQ with Answer and Explanation

The geometric mean of 1, 3, 9 is:

A. 13

B. 3.3

C. 3

D. 4.33

Answer: Option C

(1×3×9)^(1/3) = 27^(1/3) = 3.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

If index number for year 2020 (Base 2010) is 150, it means:

A. Prices are 1.5 times the 2020 prices

B. Prices have increased by 150%

C. Prices have increased by 50%

D. Prices have decreased by 50%

Correct Answer: Option C

Explanation:
An index of 150 implies current prices are 150% of the base year (which is 100), meaning a net increase of 50%.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

In a frequency distribution, the number of observations falling in a class is called:

A. Class limit

B. Class width

C. Class frequency

D. Class mark

Correct Answer: Option C

Explanation:
Class frequency is the count of data points within a particular class interval.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

According to Census 2011, the population density of India (persons per sq km) is:

A. 455

B. 382

C. 282

D. 324

Correct Answer: Option B

Explanation:
The population density of India in 2011 was 382 persons per square kilometer.

This question belongs to: Accountancy and Statistics Statistics