Sturges' rule for the number of classes k is: MCQ with Answer and Explanation

Question Report Error

Sturges' rule for the number of classes k is:

A. k = log₁₀ N

B. k = 1 + 2.322 log₁₀ N

C. k = 3.322 log₁₀ N

D. k = 1 + 3.322 log₁₀ N

Answer: Option D

Solution (By JKExamLibrary)

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

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1 Report Error

Which of the following is a characteristic of a good index number?

A. It should use only current year weights.

B. It should satisfy the circular test.

C. It should not be based on a basket of items.

D. It should be biased.

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Correct Answer: Option B

Explanation:
Desirable properties include satisfying tests like time reversal, factor reversal, circular.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

For two events, P(A)=0.4, P(B)=0.3, and P(A∩B)=0.12. Which of the following is true?

A. A and B are complementary.

B. A and B are mutually exclusive.

C. A and B are independent.

D. P(A∪B)=0.52.

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Correct Answer: Option C

Explanation:
0.4×0.3=0.12, so independent. Mutually exclusive would need 0. P(A∪B)=0.4+0.3-0.12=0.58.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

A car travels 60 km/h for the first half of a distance and 40 km/h for the second half. The average speed (km/h) is:

A. 48

B. 52

C. 45

D. 50

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Correct Answer: Option A

Explanation:
Harmonic mean of speeds: 2 / (1/60 + 1/40) = 2 / (5/120) = 240/5 = 48 km/h.

This question belongs to: Accountancy and Statistics Statistics

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