If every observation in a dataset is doubled, the arithmetic mean: MCQ with Answer and Explanation

Question

Share Report Error

If every observation in a dataset is doubled, the arithmetic mean:

A. Remains unchanged

B. Increases by 2

C. Becomes half

D. Is also doubled

Answer: Option D

Solution (By JKSSB Mock Tests)

Mean is affected by change of scale; multiplying by 2 scales the mean by 2.

This question belongs to: Accountancy and Statistics Statistics

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Statistics Questions

Question #1

Share Report

Consider the following: 1. CPI-IW is compiled by Labour Bureau. 2. CPI-Rural, Urban, Combined base year is 2012. 3. CPI basket includes both goods and services. Which of the above is/are correct?

A. 1, 2 and 3

B. 1 and 3 only

C. 2 and 3 only

D. 1 and 2 only

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option A

Explanation:
All three statements are factually correct.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Share Report

Which of the following is true about the mode?

A. Can be more than one

B. Always unique

C. Always equal to median

D. Always less than mean

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option A

Explanation:
A distribution can be bimodal or multimodal.

This question belongs to: Accountancy and Statistics Statistics

Question #3

Share Report

In a modern population census, 'de facto' enumeration refers to counting people:

A. Based on their place of birth

B. Based on their legal voting constituency

C. At their usual place of residence

D. Where they are found on the day of the census

View Answer & Solution Discuss

Get Complete Subject PDF for Accountancy and Statistics

Correct Answer: Option D

Explanation:
The de facto method counts individuals exactly where they are present on the night of the census.

This question belongs to: Accountancy and Statistics Statistics

Explore All Statistics MCQs