UTI स्टॉक पर 30 नवीनतम रिटर्न का एक नमूना $0.13 के नमूना मानक विचलन के साथ $4 के एक माध्य रिटर्न को दर्शाता है। नमूना माध्य की अनुमानित मानक त्रुटि है:

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SSC CGL Tier-II ( JSO ) 2019 Official Paper ( Held On : 17 Nov 2020 )
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  1. $0.55
  2. $0.02
  3. $0.34
  4. $0.22

Answer (Detailed Solution Below)

Option 2 : $0.02
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दिया गया है

n = नमूना आकार = 30

σ = मानक विचलन = 0.13

सूत्र

नमूना माध्य की मानक त्रुटि = σ/√n

गणना

नमूना माध्य की मानक त्रुटि = 0.13/√30

∴ नमूना माध्य की मानक त्रुटि 0.02 है। 

 

माध्य μX̅  के नमूना वितरण का माध्य = μ

प्रतिस्थापन σ2 के साथ नमूने का प्रसरण = σ2/n

प्रतिस्थापन के साथ माध्य का मानक विचलन = σ/√n या S/√n

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