A frequency distribution that uses 'less than' or 'more than' type classes is called: MCQ with Answer and Explanation

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A frequency distribution that uses 'less than' or 'more than' type classes is called:

A. Grouped frequency distribution

B. Simple frequency distribution

C. Cumulative frequency distribution

D. Bivariate frequency distribution

Answer: Option C

Solution (By JKSSB Mock Tests)

Cumulative frequency distributions sum frequencies up to a point or from a point.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

If P(A)=0.4, P(B)=0.3, and A, B are mutually exclusive, then P(A∪B) is:

A. 0.12

B. 0.58

C. 0.1

D. 0.7

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Correct Answer: Option D

Explanation:
P(A∪B) = P(A)+P(B) = 0.4+0.3=0.7.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Sturges' rule for the number of classes k is:

A. k = log₁₀ N

B. k = 3.322 log₁₀ N

C. k = 1 + 2.322 log₁₀ N

D. k = 1 + 3.322 log₁₀ N

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Correct Answer: Option D

Explanation:
The formula k = 1 + 3.322 log₁₀ N gives an approximate optimal number of classes.

This question belongs to: Accountancy and Statistics Statistics

Question #3

The class midpoint is also known as:

A. Class limit

B. Class frequency

C. Class mark

D. Class interval

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Correct Answer: Option C

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

This question belongs to: Accountancy and Statistics Statistics

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