The mode is undefined when: MCQ with Answer and Explanation

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The mode is undefined when:

A. Data are continuous

B. There is one peak

C. Data are negative

D. All values appear equally frequently

Answer: Option D

Solution (By JKSSB Mock Tests)

If no value repeats or all frequencies equal, there is no mode.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The weighted mean is used when:

A. Different items have different degrees of importance

B. Data are symmetric

C. Data are qualitative

D. All items have the same importance

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Correct Answer: Option A

Explanation:
Weights reflect relative importance of each item.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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In a frequency distribution, the class width is 8, and the mid-value of a class is 42. The lower limit of that class is:

A. 38

B. 40

C. 34

D. 36

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Correct Answer: Option A

Explanation:
Lower limit = mid-value - width/2 = 42 - 4 = 38.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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In the context of data collection, what is the fundamental difference between a schedule and a questionnaire?

A. There is no difference; they are synonymous.

B. A schedule is filled by the enumerator, while a questionnaire is filled by the respondent.

C. A schedule contains more questions than a questionnaire.

D. A questionnaire is always sent by mail, whereas a schedule is emailed.

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Correct Answer: Option B

Explanation:
Schedules require trained enumerators to ask questions and record answers, reducing non-response rates compared to questionnaires.

This question belongs to: Accountancy and Statistics Statistics

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