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

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

A. 7

B. 8

C. 6

D. 5

Answer: Option A

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

No comments yet. Be the first to start the discussion!

Question #1 Report Error

A frequency distribution with open-end intervals cannot be used to compute:

A. Median

B. Mode

C. Arithmetic mean accurately

D. Quartiles

Correct Answer: Option C

Explanation:
Without exact limits, the arithmetic mean cannot be calculated precisely.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

The perinatal mortality rate includes:

A. Deaths from 1 month to 1 year

B. Stillbirths and deaths in first week of life

C. All infant deaths under one year

D. Maternal deaths during childbirth

Correct Answer: Option B

Explanation:
Perinatal period = 28 weeks gestation to 7 days after birth.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

A box contains 3 defective and 7 non-defective items. Two items are selected at random. The probability that exactly one is defective is:

A. 1/5

B. 14/45

C. 21/45

D. 7/15

Correct Answer: Option D

Explanation:
Total C(10,2)=45. Favorable: 3×7=21. Probability=21/45=7/15.

This question belongs to: Accountancy and Statistics Statistics