17 Albedo of ice melt ponds. The National Snow and Ice Data Center (NSIDC) took a collection of data on the albedo, depth, and physical characteristics of ice-melt ponds in the Canadian Arctic. Albedo is the ratio of the light reflected by the ice to that received by it. (High albedo values give a white appearance to the ice.) Visible albedo values were recorded for a sample of 504 ice-melt ponds located in the Barrow Strait in the Canadian Arctic; these data are saved in the PONDICE file.

a. Find a 90% confidence interval for the true mean visible albedo value of all Canadian Arctic ice ponds.

b. Give both a practical and a theoretical interpretation of the interval.