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- Static Method:
`out`=**stackloss***()* -
Brownlee’s Stack Loss Plant Data

#### Description

Operational data of a plant for the oxidation of ammonia to nitric acid.

#### Format

`AirFlow`

Flow of cooling air.

`WaterTemp`

Cooling Water Inlet temperature.

`AcidConc`

Concentration of acid (per 1000, minus 500).

`StackLoss`

Stack loss

#### Details

“Obtained from 21 days of operation of a plant for the oxidation of ammonia (NH3) to nitric acid (HNO3). The nitric oxides produced are absorbed in a countercurrent absorption tower”. (Brownlee, cited by Dodge, slightly reformatted by MM.)

`AirFlow`

represents the rate of operation of the plant.`WaterTemp`

is the temperature of cooling water circulated through coils in the absorption tower.`AcidConc`

is the concentration of the acid circulating, minus 50, times 10: that is, 89 corresponds to 58.9 per cent acid.`StackLoss`

(the dependent variable) is 10 times the percentage of the ingoing ammonia to the plant that escapes from the absorption column unabsorbed; that is, an (inverse) measure of the over-all efficiency of the plant.#### Source

Brownlee, K. A. (1960, 2nd ed. 1965). Statistical Theory and Methodology in Science and Engineering. New York: Wiley. pp. 491–500.

#### References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988). The New S Language. Monterey: Wadsworth & Brooks/Cole.

Dodge, Y. (1996). The guinea pig of multiple regression. In: Robust Statistics, Data Analysis, and Computer Intensive Methods; In Honor of Peter Huber’s 60th Birthday, 1996, Lecture Notes in Statistics 109, Springer-Verlag, New York.

#### Examples

t = octave.dataset.stackloss; # TODO: Create linear model and print summary

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