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For a random variable, X, let be the sample average. The sample size is n. The mean and the standard deviation of X are μ and σ, respectively. The standard deviation of is
  • a)
  • b)
    σ
  • c)
    σ/n
  • d)
Correct answer is option 'D'. Can you explain this answer?
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For a random variable, X, let be the sample average. The sample size ...
Standard deviation, s =
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For a random variable, X, let be the sample average. The sample size is n. The mean and thestandard deviation of X are μ and σ, respectively. The standard deviation of isa)nσb)σc)σ/nd)Correct answer is option 'D'. Can you explain this answer?
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