The authors of a paper introduced collected data on blood lead concentration (in mg/dL) for a
representative sample of 59 golden eagles from the Atlantic coast and a representative sample of 216
golden eagles from the Pacific coast. More information is in the table below.

Construct a 99% confidence interval for the mean difference in blood lead concentration (in mg/dL)
for Atlantic coast golden eagles and Pacific coast golden eagles. (Use Atlantic − Pacific. Use
technology to calculate your critical value. Enter your answer using interval notation. Round your
numerical values to two decimal places.)