Match the following symbol to what it represents.
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  1. x\displaystyle \overline{{x}}
  2. N(μ,σn)\displaystyle {N}{\left(\mu,\frac{\sigma}{\sqrt{{{n}}}}\right)}
  3. n\displaystyle {n}
  4. σn\displaystyle \frac{\sigma}{\sqrt{{{n}}}}
  5. σ\displaystyle \sigma
  6. μ\displaystyle \mu
  7. SRS