Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science

यदि ∑x = 230, ∑x 2  = 6500 और प्रेक्षणों की संख्या N = 10 है, तो मानक विचलन का मान है

1
9
2
10
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1 1
4
12
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