In a frequency distribution, if the class midpoints are 10, 20, 30, 40, the class width is: MCQ with Answer and Explanation

Question Report Error

In a frequency distribution, if the class midpoints are 10, 20, 30, 40, the class width is:

A. 5

B. 20

C. 10

D. 15

Answer: Option C

Solution (By JKExamLibrary)

Difference between consecutive midpoints = 10, so class width = 10.

This question belongs to: Accountancy and Statistics Statistics

Discuss this Question (0)

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

Practice More Statistics Questions

Question #1 Report Error

Which of the following is a component of HDI (Human Development Index)?

A. Net Reproduction Rate

B. Gross Reproduction Rate

C. Life expectancy at birth

D. Crude Death Rate

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
HDI includes life expectancy, education, and income.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

A questionnaire is said to be structured if:

A. It is very long

B. It allows the interviewer to change questions

C. It contains only open-ended questions

D. It has a fixed set of questions with predetermined response options

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Structured questionnaires use standard questions and answer choices, facilitating easy coding.

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. 14/45

B. 1/5

C. 21/45

D. 7/15

View Answer & Solution Discuss

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

Explore All Statistics MCQs