Barnes & Noble stores recently began selling the Nook. With this device, you can download over 1,500 books electronically and read the book on a small monitor instead of purchasing the book. Assume you have the number of Nooks sold each day for the last month at the Barnes & Noble store at the Market Commons Mall in Riverside, California. Describe a condition in which this information could be considered a sample. Illustrate a second situation in which the same data would be regarded as a population.