The class midpoint is also known as: MCQ with Answer and Explanation

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The class midpoint is also known as:

A. Class frequency

B. Class mark

C. Class interval

D. Class limit

Answer: Option B

Solution (By JKSSB Mock Tests)

Class mark = (lower limit + upper limit)/2.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If the occurrence of one event precludes the occurrence of another, the events are:

A. Equally likely

B. Mutually Exclusive

C. Independent

D. Exhaustive

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Correct Answer: Option B

Explanation:
Mutually exclusive means disjoint events; if one happens, the other definitively cannot.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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If attributes A and B are positively associated, then (AB) is:

A. Less than (A)(B)/N

B. Greater than (A)(B)/N

C. Zero

D. Equal to (A)(B)/N

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Correct Answer: Option B

Explanation:
Positive association means observed joint frequency exceeds independence expectation.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Gross Reproduction Rate (GRR) considers births of:

A. Male children only

B. Female children only

C. First child only

D. All children

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Correct Answer: Option B

Explanation:
GRR is the average number of daughters a woman would bear, ignoring mortality.

This question belongs to: Accountancy and Statistics Statistics

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