According to Sturges' rule, the approximate number of classes for n = 50 is: (Use k = 1 + 3.322 log₁₀ n) MCQ with Answer and Explanation

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According to Sturges' rule, the approximate number of classes for n = 50 is: (Use k = 1 + 3.322 log₁₀ n)

A. 6

B. 7

C. 8

D. 5

Answer: Option B

Solution (By JKSSB Mock Tests)

log₁₀50 ≈ 1.699; 3.322 × 1.699 ≈ 5.64; 1 + 5.64 = 6.64, which rounds to 7 classes.

This question belongs to: Accountancy and Statistics Statistics

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The probability of an event A is 0.2. The odds in favor of A are:

A. 5:1

B. 4:1

C. 1:5

D. 1:4

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Correct Answer: Option D

Explanation:
Odds = P(A) : P(A') = 0.2 : 0.8 = 1:4.

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Question #2

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Which source is MOST appropriate for obtaining secondary data on national employment trends?

A. Using data from the Periodic Labour Force Survey (PLFS) reports

B. Distributing questionnaires to job seekers

C. Interviewing employment exchange officials

D. Conducting a new household survey

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Correct Answer: Option A

Explanation:
The Periodic Labour Force Survey (PLFS) is an official government publication providing comprehensive employment data, making it a reliable source of secondary data for national trends.

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Question #3

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The median of 2, 2, 3, 4, 5, 5, 5, 6 is:

A. 5.5

B. 5

C. 4.5

D. 4

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Correct Answer: Option C

Explanation:
Ordered data, n=8, median = average of 4th and 5th = (4+5)/2=4.5.

This question belongs to: Accountancy and Statistics Statistics

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