# Reserve Problems Chapter 12 Section 1 Problem 11 An article in Technometrics (1974, Vol. 16, pp....

###### Question:  Reserve Problems Chapter 12 Section 1 Problem 11 An article in Technometrics (1974, Vol. 16, pp. 523-531) considered the following stack-loss data from a plant oxidizing ammonia to nitric acid. Twenty-one daily responses of stack loss (the amount of ammonia escaping) were measured with air flow X[, temperature X2, and acid concentration X3 . y X X2 X3 42 80 27 89 37 80 27 88 37 75 25 90 28 62 24 87 18 62 22 87 18 62 23 87 19 62 24 93 20 62 24 93 15 58 23 87 14 58 18 80 14 58 18 89 13 58 17 88 11 58 18 82 12 58 19 93 8 50 18 89 7 50 18 86 8 50 19 72 8 50 19 79 9 50 20 80 15 56 20 82 Activate Windows Go to Settings to activate Windo 15 70 20 91
(a) Fit a linear regression model relating the results of the stack loss to the three regressor variables. Round your answers to two decimal places (e.g. 98.76). 1+1 x + Jez = beat (b) Estimate op. Round your answer to two decimal places (e.g. 98.76). () Use the model in part (a) to predict stack loss when x1 = 61, x2 = 25, and x3 = 84. Round your answer to one decimal place (e.g. 98.7).

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