If the sum of 20 observations is 400, what is the Arithmetic Mean? MCQ with Answer and Explanation

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If the sum of 20 observations is 400, what is the Arithmetic Mean?

A. 10

B. 40

C. 200

D. 20

Answer: Option D

Solution (By JKSSB Mock Tests)

Mean = Sum of observations / Number of observations = 400 / 20 = 20.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

If the geometric mean of two numbers is 12 and one number is 18, the other number is:

A. 9

B. 10

C. 8

D. 6

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Correct Answer: Option C

Explanation:
Geometric mean = √(x×y). Given √(18×y)=12, square both sides: 18y=144, so y=144/18=8. This uses the definition of geometric mean for two values.

This question belongs to: Accountancy and Statistics Statistics

Question #2

The primary advantage of secondary data is:

A. Saves time and money

B. Tailored to research need

C. Unique

D. High accuracy

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Correct Answer: Option A

Explanation:
Secondary data is already available, reducing time and cost of collection.

This question belongs to: Accountancy and Statistics Statistics

Question #3

In data compilation, the process of arranging raw data into categories based on shared characteristics is called:

A. Tabulation

B. Classification

C. Editing

D. Presentation

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Correct Answer: Option B

Explanation:
Classification is the systematic arrangement of data into homogeneous groups based on common attributes, which is a prerequisite for meaningful tabulation and analysis.

This question belongs to: Accountancy and Statistics Statistics

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