Refer to Exercise 13.7.a Construct a 95% confidence
Chapter 13, Problem 23E(choose chapter or problem)
Refer to Exercise 13.7.
a Construct a 95% confidence interval for the mean amount of polluting effluent per gallon for plant A. If the limit for the mean amount of polluting effluent is 1.5 pound/gallon, would you conclude that plant A exceeds this limit? Why?
b Give a 95% confidence interval for the difference in mean polluting effluent per gallon for plants A and D. Does this interval indicate that mean effluent per gallon differs for these two plants? Why?
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