31 . নমুনা পরিমিত ব্যবধানের সূত্র কোনটি? (What is the formula of the sample standard deviation ?)

• A. $\frac{\sum {\left(x_i-x\right)}^2}{n-1}$
• B. $\sqrt{\frac{\sum {\left(x_i-x\right)}^2}{n-1}}$
• C. $\frac{\sum \left(x_i-x\right)}{n-1}$
• D. $\frac{\sum \left|x_i-x\right|}{n-1}$

View Answer	Favorite Question	Report

Discuss in Forum

Workspace

Answer: Option B

Explanation: