An article presents measurements of arsenic concentrations in fish found in Northern Canada. In a sample of eight whitefish caught in Yellowknife Bay, the mean arsenic concentration in the liver was 0.32 mg/kg, with a standard deviation of 0.07 mg/kg. Find a 95% confidence interval for the concentration in whitefish found in Yellowknife Bay. (Round the final answers to four decimal places.) The 95% confidence interval is