Characterizing Top 5% of Influent Substrate Concentration in Reactor

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SUMMARY

The discussion focuses on characterizing the top 5% of influent substrate concentration in a reactor, which follows a normal distribution with a mean (\mu) of 0.30 mg/cm³ and a standard deviation (\sigma) of 0.06 mg/cm³. To find the threshold concentration value (k) for the largest 5%, the equation P(X >= k) = 0.05 is utilized. By referencing the z-table, the corresponding z-score of 1.64 is identified, leading to the calculation of k as 0.36 mg/cm³.

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Statisticians, chemical engineers, and researchers involved in reactor design and optimization, particularly those focusing on substrate concentration analysis.

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Substrate concentration (mg/cm^3) of influent to a reactor is normally distributed with [tex]\mu = 0.30[/tex] and [tex]\sigma[/tex] = .06

The question is how would you characterize the largest 5% of all concentration values?

What does this mean?
 
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I think its probably P(X>=k) = 0.05, solve for k.
 
Fightfish said:
I think its probably P(X>=k) = 0.05, solve for k.

P(X >= k) =0.05
1- n = 0.05 n= 0.95 (Look up value in z-table)
1.64 = 0.9495

[tex]\frac{k - 0.30}{0.06}=0.9495[/tex]

After solving, k = 0.36
 

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