1 Recycling one ton of newspaper saves 15 trees. 2  Every ton of newspaper recycled saves 4100 kWh or enough energy to power a TV for 31 hours. 3  Recycling a soda can saves 96 percent of the energy used to make a can from ore and produces 95 percent less air pollution and 97 percent less water pollution. Recycling one ton of cardboard saves over nine cubic yards of landfill space. 2  Number of landfills in operation in 1978: 14,000; in 1988: 7,924; in 2001: 1,858; in 2006: 1,754. 3  Recycling one ton of newspaper saves 15 trees. 4  Every ton of newspaper recycled saves 4100 kWh or enough energy to power a TV for 31 hours.
Confidence Interval Formula. Confidence interval can be calculated from the formula. The collection of tools employs the study of methods and procedures used for gathering, organizing, and analyzing data to understand theory of Probability and Statistics.
Based on the sample provided, the confidence interval for the population mean is 98.08 o ÂµÂµÂµÂµ o. The interval is the same here as in Section 7-2, but in some other cases, the difference would be much greater. x â ÂµÂµÂµÂµ Copyright Â© 2007 Pearson Education, Inc Publishing as Pearson Addison-Wesley.