Question

Which one of the following is a correct statement?

• A. \(5 \times \text{Mean Deviation} = 4 \times \text{Standard Deviation}\)
• B. \(3 \times \text{Quartile deviation} = 2 \times \text{Standard Deviation}\)
• C. \(4 \times \text{Mean deviation} = 3 \times \text{Standard Deviation}\)
• D. \(4 \times \text{Mean deviation} = 5 \times \text{Standard Deviation}\)

Hint:

Memorize the simple ratio among the measures of dispersion for a normal distribution:
\[ 4 \times \text{SD} = 5 \times \text{MD} = 6 \times \text{QD} \]
This helps you quickly verify any of these relations during the exam.

Answer 1

The Correct Option is A