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laila [671]
3 years ago
5

Check my answer please?

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
7 0
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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