A laboratory in Colorado is interested in finding the mean chloride level for a healthy resident in the state. A random sample of80

healthy residents has a mean chloride level of106

mEq/L. If it is known that the chloride levels in healthy individuals residing in Colorado have a standard deviation of40

mEq/L, find a95

%

confidence interval for the true mean chloride level of all healthy Colorado residents. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.

What is the lower limit of the95

%

confidence interval?

What is the upper limit of the95

%

confidence interval?