statistics homework question

Question

The mean weight of a sample of 201 pigs is 6.7 pounds with a population standard deviation of 1.6 pounds. Construct a 90% confident interval for the true mean of all pigs. Write a sentence interpreting answer

Answer 1

The margin of error is E= 1.65*1.6/sqrt(201) = 0.18621124258667

 

  The confidence interval is   ( 6.7 -E,  6.7+E)

 

 (6.51378857, 6.88621112425866)