Which of the following data collection methods is most suitable when the area of investigation is large and funds are limited? MCQ with Answer and Explanation

Question

Which of the following data collection methods is most suitable when the area of investigation is large and funds are limited?

A. Observation method

B. Schedule through enumerators

C. Direct personal interview

D. Mailed questionnaire

Answer: Option D

Solution (By JKSSB Mock Tests)

Mailed questionnaire is economical and can cover a wide area with limited resources.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If the probability that a student passes Mathematics is 0.7, passes English is 0.6, and passes both is 0.4, what is the probability that the student passes at least one subject?

A. 0.7

B. 0.9

C. 0.8

D. 1.0

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Correct Answer: Option B

Explanation:
P(Math ∪ English) = P(Math) + P(English) - P(both) = 0.7 + 0.6 - 0.4 = 0.9. This uses the addition theorem to avoid double-counting students who pass both.

This question belongs to: Accountancy and Statistics Statistics