A laboratory in Florida is interested in finding the mean chloride level for a healthy resident in the state. A random sample of 90 healthy residents has a mean chloride level of 98 mEq/L. If it is...

A laboratory in Florida is interested in finding the mean chloride level for a healthy resident in the state. A random sample of 90 healthy residents has a mean chloride level of 98 mEq/L. If it is known that the chloride levels in healthy individuals residing in Florida have a standard deviation of 42 mEq/L, find a 99% confidence interval for the true mean chloride level of all healthy Florida residents. Then give its lower limit and upper limit.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)