environmentalco
26. Environmental Scores. Greenpeace International publishes its rankings of the major manufacturers of electronics, according to their policies on toxic chemicals, recycling, and climate change. The following data set represents the scores received for a random sample of companies in Greenpeace's September 2008 report and their November 2008 report. Higher scores mean that the company is more environmentally responsible in these areas. Test whether a rank correlation exists between the two reports, using level of significance .
| Electronics company |
September 2008 score |
November 2008 score |
|---|---|---|
| Nokia | 7.0 | 6.9 |
| Toshiba | 4.7 | 5.9 |
| Samsung | 5.7 | 5.9 |
| Microsoft | 2.2 | 2.9 |
| Motorola | 3.7 | 5.3 |
| Sharp | 3.1 | 4.9 |
| Dell | 4.7 | 4.7 |
| Philips | 4.3 | 4.1 |