Which of the following is a source of secondary data? MCQ with Answer and Explanation

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Which of the following is a source of secondary data?

A. Data collected through experiment

B. Personal diary of the investigator

C. Unpublished thesis records

D. Direct observation of traffic

Answer: Option C

Solution (By JKSSB Mock Tests)

An unpublished thesis is a document containing data originally collected by someone else, making it secondary data for another researcher.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

The arithmetic mean of the numbers 12, 18, 24, and 30 is:

A. 24

B. 22

C. 20

D. 21

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Correct Answer: Option D

Explanation:
Arithmetic mean = (12 + 18 + 24 + 30) / 4 = 84 / 4 = 21. This is the sum of observations divided by the number of observations.

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Question #2

If the Arithmetic Mean (AM) of two positive numbers is 10 and their Geometric Mean (GM) is 8, what is their Harmonic Mean (HM)?

A. 6.4

B. 9.0

C. 7.2

D. 8.5

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Correct Answer: Option A

Explanation:
For two positive numbers, AM × HM = GM². Therefore, 10 × HM = 64, which gives HM = 6.4.

This question belongs to: Accountancy and Statistics Statistics

Question #3

The arithmetic mean of a data set is not a good representative if:

A. Data have extreme outliers

B. Data are normally distributed

C. Data are symmetric

D. Data are large

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Correct Answer: Option A

Explanation:
Outliers distort the mean; median is preferred in such cases.

This question belongs to: Accountancy and Statistics Statistics

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