lanna0626
lanna0626 lanna0626
  • 03-06-2016
  • Mathematics
contestada

Check my answer please?

Check my answer please class=

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caylus
caylus caylus
  • 03-06-2016
Hello,

In my old memories,
p(μ-2σ<=X<=μ+2σ)=95%
p(μ-3σ<=X<=μ+3σ)=99%


1000-2*200=1000-400=600
1000+2*200=1000+400=1400

Answer A



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