lanna0626
lanna0626
03-06-2016
Mathematics
contestada
Check my answer please?
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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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