The standard deviation of 7 consecutive integers with mean 0 is _______.
0 माध्य (Mean) वाले 7 क्रमागत पूर्णांकों (Integer) का मानक विचलन (Standard deviation) _______ है।
Answer और ExplanationAnswer and explanation
Answer: (D) 2
संख्याएँ −3, −2, −1, 0, 1, 2, 3 हैं (माध्य (Mean) 0)
Σx² = 9 + 4 + 1 + 0 + 1 + 4 + 9 = 28
प्रसरण (Variance) = 287 = 4, मानक विचलन (SD) = √4 = 2
✓
मानक विचलन 2 है।
The numbers are −3, −2, −1, 0, 1, 2, 3 (mean 0)
Σx² = 9 + 4 + 1 + 0 + 1 + 4 + 9 = 28
Variance = 287 = 4, SD = √4 = 2
✓
The standard deviation is 2.
Source: RRB NTPC (Graduate) · 22 Mar 2026 · Shift 1। Solution: Prashant Sir, Vijayastra।Source: RRB NTPC (Graduate) · 22 Mar 2026 · Shift 1. Solution by Prashant Sir, from Vijayastra.