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NDA 2013
Exam
NDA
Year
2013
Subject
Mathematics
Chapter
Statistics

NDA 2013 · Mathematics · Statistics

The standard deviation of the observations 5,5,5,5 , 5 is

The standard deviation of the observations 5,5,5,55,5,5,5, 5 is

Options

  1. A00
  2. B55
  3. C2020
  4. D2525

Correct answer

A. 00

Step-by-step solution

x=5σ2=∑i=15(x1−xˉ)2N=0\begin{aligned} & x=5 \\ & \sigma^2=\sum_{i=1}^5 \frac{\left(x_1-\bar{x}\right)^2}{\mathrm{ N}}=0\end{aligned}
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