A recent study suggests that there is a relationship between Twitter use and TV ratings.26 A random sample of prime-time television shows was obtained. During the month of September, the Twitter...

A recent study suggests that there is a relationship between Twitter use and TV ratings.26 A random sample of prime-time television shows was obtained. During the month of September, the Twitter volume (x, in millions) of tweets on the day of each show and the Nielsen TV rating ( y) was recorded for each show. The summary statistics are

In a global study by Transparency International, it was found that a country’s environmental performance is related to political corruption. A random sample of 15 countries was selected. The Transparency International Corruption Perceptions Index (CPI, x), a measure of perceived corruption among public officials and politicians, was computed for each country. In addition, the Environmental Sustainability Index (ESI, y), a measure of overall progress toward environmental sustainability, was computed for each country. The estimated regression