536 What confidence would be associated with each of the fol

5.3.6. What confidence would be associated with each of the following intervals? Assume that the random variable Y is normally distributed and that sigma is known.

Solution

a)

99% confidence interval , since Z(99%) = 2.33

b)

99.5%

confidence interval , since Z(99.5%) = 2.58

c)

95% confidence interval , since Z(95%) = 1.64